That question is similar to the question Muslim leaders face: How to condemn ISIS without contradicting the Koran?
Liberal Christians like President Obama spend a lot of time telling everyone, including Muslims, what Islam really is. President Bush did it too, promoting the idea that Islam is really a “religion of peace.” Maybe they should just go ahead and tell the Muslims that what Islam really is, is wrong. That Jesus died for their sins, rose from the dead, and will come again to judge all of us. Stop trying to trick Muslims into some kind of phony liberal Islam made up by the State Department, and start telling them to repent and be baptized. They might not believe it, but they are more likely to respect it. And this may not make it more attractive to a politician, but it has the added feature of being the truth