ESH. There's no way to say you or her are the innocent one's in this situation: sorry.

Even if she did start taking the course of insulting you during a debate but you remained cordial and professional, you still decided to get into a heated argument with her about a subject that is controversial. However, I wouldn't take back your comments and I would certainly stand my ground against her; breaking your possessions is definitely not ok. If someone broke my stuff, it's pretty clear who's wrong: she is. You're entitled to your views and no one should be a whiny baby during a debate: your friend clearly was one and I'd tell her to F off or apologize and pay for my things if she ever wanted to come back.