And most of those movies rehabilitate the actual bad guys. Still, if you've also seen the movie, you can add a little, 'and this is what really happened'. Or insist (with examples and am explanation) that these events cannot be understood I'm isolation. One of the propaganda functions of movies is to make it seem like capitalist atrocities are one offs or committed by a bad apple. Just don't fall out with your family over it.
To answer your question:
- Seeing politics exclusively as party politics
- Thinking that either nothing can be done or that the solution is electoral
- Thinking that reforms will solve our problems
- Refusing to understand that Stalin is dead (I know, it's hard to accept 😥) and so could have no control over a revolution today – i.e. they insist that socialism cannot work because they dislike the only example they think they understand; and fail to understand that a revolution means that they will be in power and can take whatever decisions they like.
Maybe these aren't that weird. But they are tedious and annoying.