I'm not discounting your point, I definitely know many people that get easily wound-up about issues that have nothing to do with them, but simply something to consider: If you're talking to strangers or acquaintances, are you really sure that the issues they are fighting about don't relate to them personally?
There are one or two political issues that I consider literally a matter of life-or-death. As in, I know people personally who would likely have died if a situation that happened to them a few years ago in one state in the US happened a few weeks ago in a different state in the US.
I agree with your general premise that people need to stop judging the world based on tropes - that's the problem that causes the political issues I'm thinking of - but it's hard not to occasionally get angry when people keep talking about life-or-death issues as if they're some sort of abstract galaxy brain.