Is it natural for guys to start becoming rude to a girl if they reject them or tell them they're not attracted to them?

I understand it's hard to hear that someone you like doesn't like you back or isn't attracted to you, but is it really necessary to be rude to the girl or start insulting her as a result? If a guy I like doesn't want me, I feel upset, but I wouldn't ever be rude to them or insult them, I would just leave them & go through my emotions on my own without taking it out on the guy.
Is it natural for guys to start becoming rude to a girl if they reject them or tell them they're not attracted to them?
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