But Chrislam does make sense with one condition. We discussed the "rapture" in our (coonservative) Bible class for several weeks. After all the believers are gone, the ones left are subject to a great deception. Chrislam, or a variation of it, must be part of this deception. A one world religion.
I also believe that after the rapture, that the unhindered, evil violence of islam will be a tool used by God to pour out His wrath upon the world.
There is Biblical and historical precedence for God using the most ungodly for His purposes.