If I was invited to speak to a muslim group, I wonder how I would handle it?
I figure if they’ve invited you, knowing what you believe, then they must want to hear more of it. Preach Christ and wind up with the invitation just like you would anywhere else.
If Warren will do that, he’ll have my respect. If not, he should skip this venue.
Our pastor was invited once to speak about Christianity to the muslim student group on our college campus. He walked into an ambush -- it turns out that, without telling him, the student group also brought in one of Islam's foremost apologists (Jamal Badawi) to "debate" our pastor.
Our guy held his own well enough, but he wasn't nearly as polished (or as well prepared) as Badawi, and came across as the much weaker of the two.
Of course, God isn't limited by the shortcomings of His servants, so who knows -- perhaps some were intrigued by the Good News nonetheless.