He’ll find not such a warm welcoming when they have the numbers to overwhelm him...this is just a classic move that always comes back and bites the one who opens their door to Islam...
NJ had a “Muslim problem” long before Christie was on the scene; some of the 9/11 hijackers were living here, and there were already scads of them in Jersey City, Paterson, etc.
I don’t think he’s VP material (simply because his solutions here in NJ addressed problems some states don’t even have), but he’s been the only thing keeping NJ affordable for middle-class Americans.