I hope you can gently remind them that staying in a church where a pastor preaches hate is exactly what Obama did. Decent people pick up and move on when the pastor goes in that direction. We all make our choices — the Bible tells us that humans often make bad choices, but we are called upon to try to do the right thing.
Decent people STAY, and send the false preacher packing, before he leads any more of God's children astray.
It is CHRIST's church, not the pulpit-pounder's; and Paul explicitly told us what to do with anyone bearing/preaching false doctrines.
It is past time to go Biblical on these of whom we were warned, and drum them out of our midst.