I mean, our country was founded through a bunch of people getting really uncivil and violent. Sure, it still needed - and still needs - a lot of improvement to be fair for everyone who wasn't part of the "in-group," but the same could be said for most countries at the time ours was founded.
I certainly don't believe that it's necessary to be uncivil and violent to achieve a fair and civil society, but it has shown past success at ridding a country of leaders who don't have the people's best interests at heart.
It all makes sense when you realize who makes the cutoff for what they consider "people."