The polls of muslims worldwide demonstrate that a vast percentage, if not a majority, endorse violent jihad, terrorist bombing in the U.S. or European countries they live in, endorse Osama Bin Ladin, endorse Al Qaida, endorse ISIS.

http://www.thereligionofpeace.com/pages/opinion-polls.htm

That translates to hundreds of millions of muslims worldwide, if not "over a billion".