My theory is that you hate Hashem, and as a corollary to that also hate anyone who serves Him.
“Chareidi” is a term made up by the sonei torah to make fun of us. Your question is as if you go tell african americans that they should proudly refer to themselves by the n word.
In any event, your history is all wrong. Nobody used to call americans chareidim at all, until a few years ago when people realized there were jews in america they could hate right here*! I’ve been adopting it for myself since then.
*like the crusaders