In America's history when did the people have to fight their government with weapons? Never. In the Revolutionary war about 8,000 people died from direct combat. Today in America about 35,000 people die each year from gunshots and about another 100,000 people are shot but live.
Mother Jones had a piece about the imbeciles who think they're going to need to fight the government-
"THE .50 CALIBER Bushmaster bolt action rifle is a serious weapon. The model that Pvt. 1st Class Lee Pray is saving up for has a 2,500-yard range and comes with a Mark IV scope and an easy-load magazine. When the 25-year-old drove me to a mall in Watertown, New York, near the Fort Drum Army base, he brought me to see it in its glass case—he visits it periodically, like a kid coveting something at the toy store. It'll take plenty of military paychecks to cover the $5,600 price tag, but he considers the Bushmaster essential in his preparations to take on the US government when it declares martial law."
I haven't noticed Brits, who have strong gun laws being rounded up and killed and I can't see that happening in the US, but I can see tens of thousands of American's dying every year.
I'm not sure what the answer is though and as things stand I can understand why someone in the US might want a gun for their protection. Like tonton says, I'm glad I now live somewhere where I don't need a gun to protect myself from someone with a gun and I certainly don't think I need a gun to protect myself from the government. If things where to get that bad in the US, the reason would be because citizens HAVE guns.