Oh, and by the way: ISIS is very unpopular in Muslim communities.
The futures of the two religions -- Islam and Christianity -- are pretty interesting. Pew Research finds that "Islam will grow faster than any other major religion in the world over the next four decades, according to our religious projections."
The number of Muslims will grow more than twice as fast as the overall world population between 2010 and 2050, and, in the second half of this century, will likely surpass Christians as the world’s largest religious group. Driving these changes are simple demographics: Muslims have more children than members of other religions, and they’re also relatively younger. ...PewResearch
Christianity is on its way out in America.