I've said it before and I'll say it again;
If you really want to be an ambassador for God, do so in your actions more-so than your words. I have a close buddy that is (thankfully) still willing to have religious discussions with me and only me, because of the way in which we discuss the matter. He is a great person, and a role-model to me, but he wasn't raised in the Church so he has a lot of basic Bible questions.

Point being, it's guys like these two who make it so hard for people like my friend to understand Jesus. Afterall, if 2 hate-spewing Baptists tell you you are going to hell, then Jesus is a myth, because it is His job to judge, and ours to see only the best in each other.