I have no interest in winning over the Left.
Ordinarily, that would be the Right's loss.
The other fact that is apparently totally lost on you is that it's not the Left that is necessarily available to be "won over," but those who are undecided.
You must be a heck of an advocate for your Christian beliefs if you have no interest in winning over those who are opposed. Wouldn't you fault radical Islam for having that same attitude toward those who oppose their views?
Don't bother to answer that unless you have something THOUGHTFUL and INSIGHTFUL to say, please.
Personally, I have trouble with dogmatists of ANY stripe.