Why does people get their sexualities treat like that

Like it was all normal untill charle calls my friend and his bf gay and that made me step up for them
I wasn't bullying until when one triggers me
That's when my insulting mood kicks in
U just hate how people treats your sexuality calling
You gay like that's a hypocrite thing
It's rude to go around calling gay people gay
When they did nothing wrong to u
It's disrespectful not nice at all