Assuming there's 1 billion Arabic people on the planet...all you need is 100,000 members of what the U.S. classifies as terrorist groups to have 1 in 1000. ISI

Assuming there's 1 billion Arabic people on the planet...all you need is 100,000 members of what the U.S. classifies as terrorist groups to have 1 in 1000. ISIS already fills up 35,000 of that 100,000. You still have Hamas, al Queda, and many more: https://en.wikipedia.org/wiki/List_of_designated_terrorist_groups https://en.wikipedia.org/wiki/List_of_designated_terrorist_g...