Your friend "Ally" needs to do some research.
Greece and Rome did not promote same sex unions; they tolerated same sex relationships.
If you want to discuss the Bible verses that prohibit homosexuality then do so; but to post a biased unscriptural interpretation based on prejudice is not going to make your point.
As to the Popes, some of them had mistresses and appointed some of the children cardinals. If you are going to appeal to the actions of some men then why not approve of genocide?