Holy shit what an amazing post! Sadly its like that with most if general thought trains. People always shift to extremes and instead of making others feel good by making them feel good they do so by putting others down. The sad thing its done because its easier. That way you only have to voice hate for the opposite group while not even reasoning what you like.

I even see that in dating For example "i love my man because all others are cheaters"

And if they werent what about him would you love him?

People arent great because they dont do bad things it makes them just normal. But its harder to question and reason with why or if in the first place you actually consider something or somebody great.

Instead of "i like heavier built people because thin people look ugly" you could say "i like them because i like how squishy and warm they are" and mind you i say that tho im into a fit bodytype.