Emphasis on might, and only you can decide if it's worth the risk, but they would not be the first homophobic parents to "come around" after learning they have a queer child.

When our daughter came out of us, we were like, "Oh, we knew that."
Recently in a text she said, "yet (I forget the context) I have never known anything but unconditional love from you guys." I wouldn't trade it for anything.