The only reason it would be offensive is because people want it to be offensive. This is exactly the same as people not wanting to hear about the swastika just because Hitler used it in a bad way. Get over it.
I give my personal permission to repost the thread, and I will delete and warn anyone who posts off-topic like it happened here.
So it's a cross. Whoop-de-doo, I don't see the big deal. So fine, if you repost it add a [Not-For-Religious-People] tag in the title.