That sword cuts both ways.  You're preaching God's will as you see it.  People taught it to you because of their own skewed interpretations fit to what they wanted to hear.  Perhaps there's some guidance against homosexuality, although I believe the reasons for it are historical and not meant to apply to the modern world, like vast amounts of the Old Testament.

An objective reading of the bible has very little to say on this subject; Jesus didn't mention it at all.  But even if you believe that this is really against God's will, it's an item of vanishingly small importance.  The sheer amount of effort Christians put into this crusade is, in itself, a violation of God's will to love each other, support each other, and build a better world.