I've seen numerous Christian institutions that chose inclusiveness over standing on principle. They're the ones who now have gay priests, Halloween parties, think "fundies" should stay out of government and generally preach a watered-down gospel of a watered-down God because identifying sin for what it is might hurt somebody's feelings.
If you close your eyes, you can hear Bill Clinton making that same speech. With about all the credibility I'd give to Rudy on the subject.
No church has to run for election every four years. A non inclusive attitude in a politician means the other guy wins.