Is it okay/normal to say mean things to someone's face because they rejected you?

This may seem like bait, but I'm asking a genuine question. This happened to my girlfriend where she rejected her former best friend (in a nice way…

Okay? No. Normal? In the context of that person’s life, yes it’s normal, else they wouldn’t do it.

Being hurt by perceived rejection is normal and valid. Making another person “wrong” for holding a boundary for whatever reason is not valid.

People need to learn more non-violent communication, and general understanding of boundaries.

Nonviolent Communication - Wikipedia