Closer to millions.......for centuries.
Billions of followers since it's creation?
A percentage only "radical" ...potat-o, pota-toe....still wrong.
Those radicals are still bent on destroying Christians in every form.
You can bet the farm, that God has something to say about the second biggest (non Bible based) religion to have ever existed!
Don't underestimate Islam and all it's "little" names, to be some flash in the pan, fruit punch, Sunday meetings, basement cult.
They may not be The Great Babylon, ....but they are definitely mentioned in the Bible brother.
It's not Saudi Arabia either though Kenneth.
That's just an odd guess. You're the first and only one I've ever heard go with that one.