that die was cast long ago, it's just that most people don't actually want to kill another person. lots of risks, getting caught, prison, a large african american gentleman named bubba, etc.  oh, they'll say they do, but there's a big fucking difference between saying and doing.  it's objectively easier for liberals to kill conservatives because conservatives simply disagree with liberals and think they're wrong. liberals think conservatives are evil and need to die. liberalism, or leftism, at this point is very much a religion.  but the hump of going from wishing someone dead and actually killing is a big one and is why we haven't yet seen a real civil war in the us.  don't get me wrong, plans are in place to push us there (trump getting shot and the keystone kops "secret service" was pretty obviously not organic and had a desired outcome.) but i think they want conservatives to start it so they can have righteous indignation to capitalize on.
United States