I told a friend a comment she made in front of others upset me, and now she's not speaking to me, was I wrong to raise it with her?

No not at all. You told her how you felt which is fine. If she can't accept that and apologize for hurting your feelings if she didn't mean to do that then she's not a friend in the first place.
No but ahe is equally allowed to think you was ridiculous both feels can be valid
Opinion
1Opinion
No, you spoke your mind. She needs to get over it.
It depends what the comment was
Superb Opinion