When a case is provable beyond reasonable doubt, it tends to stay that way. QED. People don't bother to ask (further) questions or raise skepticism, because there is no need.
Occasionally, major crimes do happen in which serious doubt remains as to the identity of the true perps. A variation is that some of the perps get caught and others get away. Sometimes people are framed, or entrapped, perhaps to protect others. Sometimes people are forced to fall on their swords to protect others higher up the totem. Sometimes crimes/events are fabricated to demonize less-than-favored individuals, or sections of society.
As in crime, the same with politics. Unfortunately, many people are naive enough to succumb to the illusion that our own politicians and democratic (?) institutions are incapable of, or unlikely to do, anything that we wouldn't. Perhaps that is because, (in theory) they are an extension of "we the people", and therefore, what they do reflects on our own character.
Here in America (alongside most countries), there is a glaring cognitive dissonance; while on the one hand, we traditionally rail about our "the @$**ing government", hows its impossible to "walk through the cesspool that is DC without getting dirty", our "ass-licking politicians", how "crooked" and "self serving" they are, their "incompetence", "lack of integrity" and a whole slew of accusations and doubts about their capability, honesty, and intent. But when accusations, or even harsh reality bites... we tend to close ranks and protect.....
It took 18 months for the media to recognize that there was a newsworthy story behind the Watergate burglary. When Daniel Ellsberg blew the whistle with the Pentagon Papers, we blasted the messenger, and protected the criminals. When it became popularly known that the country went to war against Iraq based on "testimony" from Curveball, a man who was widely known in DC to be a compulsive liar and opportunist fraud, no heads rolled. When President Johnson, the Joint Chiefs and the national media universally lied to the US people to start the war in Vietnam, ditto. Iran Contra, ditto. CIA drug running and the crack epidemic ditto. S&L Scandal. Riggs Bank. $2.3 Trillion missing from the Pentagon. Abu Ghraib, BCCI. The huge corporate crime spree of the late 1990s and early 2000s. The Wall Street and "bankster" epidemic of corruption/embezzlement/racketeering/fraud. The list goes on and on....
Our politicians yell from our soapboxes, "lets get tough on crime"... but wait... as long as it's only people of ordinary means who face the music... we dare not hold our elites, corporate executives, military officials, politicians etc. to the same standard. We tend to close ranks to protect our institutions, and by extension individuals who hold office within those establishments. This is not just an American thing.... it happens everywhere... because it's human nature. In Germany in the 1940s, when rumors started going round about "death camps and gas ovens"... the good German people, many of whom did not approve of the Nazi Party's expansionism, would recoil in horror, citing the equivalent of today's well worn chestnut "you're a crazy conspiracy theorist"! This has become a well developed set of powerful, weasel words that that are universally coughed up to denounce skeptics... words which protect well connected criminals, words of denial, words of intellectual cowardice, and at worst, the words of traitors....
When it comes to big crime in high places, apart from the token cases that are latched onto by our controlled, unfree media to give the impression that the "system is working" (Blagojevich, Madoff.... ), the drill appears to be: "don't investigate, don't broadcast and don't punish". Our society is built on a vertical structure, ie a hierarchy, and those at the top have the means to be able to protect themselves from the consequences of wrongdoing; they have privileges, access and influence that are absolutely unavailable to folk of ordinary means. And with privilege and power, abuse happens by default... As Lord Acton was credited with saying: "power corrupts and absolute power corrupts absolutely".
Regarding Pearl Harbor: There is undeniably a large body of material and evidence which suggests complicity, prior knowledge etc. Unfortunately, the case which suggests "Pearl Harbor could have been avoided... or it was deliberately used to justify America's entry into World War II"
never went to court, where witnesses were under oath and full subpoena power was employed. Had this been the case, the popular perception of history could have been very different.
When our comfort zones get ruffled, we get pissy. We like to protect our own. Sweep it under the rug, let sleeping dogs lie. This thread is another installment of that age old argument that perpetually rages between the authoritarian types... who consistently refuses to acknowledge that our "powers-that-be", either private individuals or elected/appointed officials are anything other than "angelic do-gooders whose first priorities are the interest and wellbeing of those they command or represent".... and those who doubt that assertion.