Can someone explain leftist comedy to me?

Not looking to discuss politics. I'm just trying to find the humour in left-wing mainstream comedy.

I've tried watching at least 30 movies and as far as I can tell it's the same two tropes. Someone who is usually smart does something obviously stupid or they are uninformd about something and everyone is shocked that they just don't get it with a "seriously bro" type of comment. Or the other trope when someone who is super serious becomes upset because someone shocked them with their progressive views with a "yeah that's how it's done" type of comment.

What's funny about that?