That is likely a very low figure.
I agree.
With 2 billion Muslims in the world I would expect the number to be closer to 1 Billion.
Are we to believe 98% of the Muslim' religion has mostly heretics who want to get along with us Infidels, in spite of what the Koran and Hadiths say?
Forty two million is only about 2% of the Muslim population. ISIS practices the religion as written in the Koran and Hadiths.
Why would a Muslim not support them? -Tom