So you go around asking people if they're "Leftist"? Why? Either you get a non-answer or you start a fight with somebody for no reason -- what a strange thing to do
Discussing philosophy and politics is very normal in the prepper community.
I'm not just waking up to strangers and doing it. This is at meetups, dinners, that sort of thing. "Oh you're a libertarian? Is that more Kropotkin or Rothbard?"
At the gun range I'm just as likely to see a thin blue lives flag, punisher skull, or "don't tread on me" emblem on a gun or gun case as I am to see a hammer and sickle or trans flag. It's just part of the territory.