Counter-point: we used to call lousy things gay, and made up a whole sexuality for men who took care of their appearance (metrosexual). Perhaps it wasn't as bad as the Nazis' "useless mouths", but it certainly wasn't great.

Nowadays we call white immigrants "expats" and other immigrants "immigrants".

Words have power.

The problem is when people start using words to create a sort of password game. It keeps some people busy, makes them feel better than others for knowing the passwords, and does little for anyone else.