Terrorist attacks in London:
Islamist Attacks:7 July 2005 London bombings
21 July 2005 attempted bombings
29 June 2007 attempted car bombings
Christian Attacks:4 March 2001 BBC bombing:Real IRA detonated a car bomb outside the BBC's main news centre
6 May 2001: IRA bomb exploded at a Royal Mail sorting office in Colindale,
3 August 2001 Ealing bombing: The Real IRA exploded acar bomb in Ealing Broadway
September 2000, The Real IRA fire rocket launcher at the MI6 building in central London
16 May 1990: IRA detonate a bomb underneath a minibus killing Sgt Charles Chapman
20 July 1990: IRA exploded a large bomb at the London Stock Exchange
18 February 1991: Paddington Station, damaging the building's roof but causing no casualties. 18 February 1991 bomb explodes at Victoria Station. One man is killed and 38 people injured.
10 January 1992: Small device exploded. No injuries, Whitehall Place, London SW1.
28 February 1992: A bomb explodes at London Bridge station injuring 29 people.
10 April 1992: A large bomb explodes outside 30 St Mary Axe in the City of London.
12 October 1992: Sussex Arms public house in Covent Garden, killing one person
16 November 1992: Canary Wharf in the Docklands.
27 February 1993: a bomb outside a McDonalds restaurant in Camden Town
24 April 1993 Bishopsgate bombing: huge truck bomb in the City of London at Bishopsgate,
9 February 1996 Docklands bombing, killing two people.
15 February 1996: A 5-pound (on the Charing Cross Road.
18 February 1996: An improvised high explosive device on a bus travelling along Aldwych in central London, killing Edward O'Brien, the IRA operative transporting the device and injuring eight others.[19]
That's just the last two decades.
However these figures could rise as the Real IRA - a Catholic Terrorist Organization - vows to maintain a reign of terror on the UK mainland:
Quote:
"We have already shown our capacity to launch attacks on the British military, judicial, and policing infrastructure. As we rebuild, we are confident that we will increase the volume and effectiveness of attacks," the organisation said.
They are also attacking and murdering individuals in 'vigilante justice' on the Irish mainland:
Quote:
One element in the Real IRA's recent activity has been a wave of so-called "punishment" shootings and beatings of those they deem "antisocial elements" in nationalist working class areas. In Derry alone the Real IRA and other aligned groups have shot around two dozen men over the last 18 months.
BBC
In terms of the US rather than London the following chart is from the
FBI Website and shows terror attacks since 2005:

As you can see, Jewish terror groups have committed more terrorist acts than Islamic (not attackers who were Jews but rather actual groups like the Jewish Defence League) but the real surprise is the
CHRISTIAN terror attacks.
Many are race attacks by the KKK and associated Christian hate-groups but the number of bomb attacks on abortion clinics by non-racialist Christian groupings appears to be sky-rocketing.
In fact the FBI figures show that 96.4% of the terror attacks worldwide up until 2005 were not Islamic related - the overall majority could be loosely labelled 'Christian'.
As of this month the 2010 figures in Europe show an increase in non-Islamic terror and now the number of non-Islamic terror attacks stands at 99.6%.
Europol Report
Note: many of these 'seperatists' that make up the 84.8% of terror attacks are Christian. The IRA would come into that category as would Basque separatist groups as well as Corsican.
Of course we may also expect to see a rise in race-hate groups as the anti-Muslim hate speech increases. As yet the BNP and the EDL (neo-Nazi groups in the UK) have not mounted an all-out terror attack (though they have been preparing for several and the authorities have confiscated numerous bombs and even ricin from racist groupings) though these groups - which also claim they are Christian - will no doubt soon take violent action.
An interesting list of some of the more violent Christian terror groups is compiled
on Wikipedia.
Northern Ireland we have covered but the following are instructional:
Quote:
Canada
The Sons of Freedom, a sect of Doukhobor anarchists, have protested nude, blown up power pylons, railroad bridges, and set fire to homes, often targeting their own property.
India
The National Liberation Front of Tripura, a rebel group operating in Tripura, North-East India classified by the National Memorial Institute for the Prevention of Terrorism as one of the ten most active terrorist groups in the world, has been accused of forcefully converting people to Christianity.
The insurgency in Nagaland was led by the National Socialist Council of Nagaland (NSCN) and continues today with its faction NSCN - Isaac Muivah which explicitly calls for a "Nagalim for Christ."
Romania
Anti-Semitic Romanian Orthodox fascist movements in Romania, such as the Iron Guard and Lăncieri, were responsible for involvement in the Holocaust, Bucharest pogrom, and political murders during the 1930s.
Russia
A number of Russian political and paramilitary groups combine racism, nationalism, and Russian Orthodox beliefs.
Russian National Unity, a far right ultra-nationalist political party and paramilitary organization, advocates an increased role for the Russian Orthodox Church according to its manifesto. It has been accused of murders, and several terrorist attacks including the bombing of the US Consulate in Ekaterinburg.
Uganda
The Lord's Resistance Army, a cult guerrilla army engaged in an armed rebellion against the Ugandan government, has been accused of using child soldiers and committing numerous crimes against humanity; including massacres, abductions, mutilation, torture, rape, porters and sex slaves. It is led by Joseph Kony, who proclaims himself the spokesperson of God and a spirit medium, primarily of the Christian Holy Spirit which the Acholi believe can represent itself in many manifestations. LRA fighters wear rosary beads and recite passages from the Bible before battle.
We've covered the US and Christian hate groups like the KKK and clinic bombers but there are other significant cells too:
Quote:
A number of terrorist attacks, including the Centennial Olympic Park bombing during the 1996 Summer Olympics by Eric Robert Rudolph, were accused of being carried out by individuals and groups with ties to the Christian Identity and Christian Patriot movements; including the Lambs of Christ.
A group called Concerned Christians were deported from Israel on suspicion of planning to attack holy sites in Jerusalem at the end of 1999, believing that their deaths would "lead them to heaven."
The motive for anti-abortionist Scott Roeder murdering Wichita doctor George Tiller on May 31, 2009 was religious.
Hutaree was a Christian militia group based in Adrian, Michigan. In 2010, after an FBI agent infiltrated the group, nine of its members were indicted by a federal grand jury in Detroit on charges of seditious conspiracy to use of improvised explosive devices, teaching the use of explosive materials, and possessing a firearm during a crime of violence.
Christian Identity is a loosely affiliated global group of churches and individuals devoted to a racialized theology that asserts North European whites are the direct descendants of the lost tribes of Israel, God's chosen people. It has been associated with groups such as the Aryan Nations, Aryan Republican Army, Army of God, Phineas Priesthood, and The Covenant, The Sword, and the Arm of the Lord. It has been cited as an influence in a number of terrorist attacks around the world, including the 2002 Soweto bombings.