It’s not just a matter of being stupid. It’s the pride in being stupid, the delight in it. “Oh, these are bad? I don’t think they’re bad! I don’t have to think about the consequences of my actions, or how I live, because I like what I like and anyone who suggests I change is a commie dumbass snowflake.”
It’s not just the stupidity. It’s stupidity and arrogance, because that’s what they’ve learned from President Bad Dad.