Probably as small as 10%. So, the problem would be limited to a small core of 150,000,000 million across the world. That's all.
As long as the problem doesn't get worse, then compared to the rise of the Nazi's where Germany had a population of 60 million in the 1930's, the islam problem will be no worse than twice the carnage of WW-II.
I posted this in another thread:
I had a Muslim Pakistani colleague who was quite nice and very pleasant to work with.
He had a Ph.D in Engineering from a Western university too. Obviously an educated man.
That was when Salman Rushdie came out with his book — THE SATANIC VERSES.
After that, the Ayatollah Kohmeini issued a fatwa saying that Rushdie must be killed for his work.
I discussed this issue with him over lunch and to my unpleasant surprised, he actually AGREED with the Ayatollah.
This, from a peaceful, nice guy who was quite pleasant to work with.
Which makes me wonder .... how many “moderate” Muslims think like that?
To which the one I posted the message to responded:
I had exactly the same experience. At lunch my Muslim work “buddy” said, casually, “well, he (Rushdie) needs to die.” He then stuffed pizza into his mouth as if he’d just said, “the weather is nice.” We are crazy to let Muslims immigrate here.
See posts 8 and 12 here:
http://freerepublic.com/focus/f-news/3248701/posts
The large numbers of "moderate" Muslims might not be crazed killers, but they don't mind if someone else does their killing for them. Remember, very large percentages of "moderate" Muslims support death for blasphemers and apostates. Some moderates.