It also doesn’t really matter what you think about communism in particular, and personally, I do think that communism is a good example for the difference in opinion people have, depending on where they grow up.

For example, I do see many US-Americans having weirdly strong opinions on something they could barely be further away from experiencing.
Like, I’ve been called a “commie” as some sort of pseudo-insult, because I’m from Europe where we have socialism, a.k.a. capitalism with the state coming in at a handful of places.

Socialism is also very clearly working in several developed nations right as we speak. The USA is rather the odd-one-out here. I shouldn’t be the one being queried about how our system could possibly be working…

At the same time, I can tell for myself that I have weird reservations against communism that aren’t based in any actual knowledge.
I am much more left-leaning than most people here in Europe. I do have reservations against capitalism, which are based in personal experiences (mostly US-based IT companies fucking me over). And yet it takes a lot of self-awareness to keep an open mind when people here start raving about communism…