Listening to the International Panel talk at the 2017 Ligonier Conference, the host mentioned 80% of Muslims are non-muslims who do not care about the Quran. Only the small percentage, the radicals are true Muslims.
I'm not sure of the host's intention - diminishing Dr. Tong's claim that Indonesia as most Muslim populous country as greatest challenge to Christian ministry? I hope I'm wrong.
I used to think that way too, that these "moderate" Muslims knows nothing about their religion other than being born in a "Muslim" family. I guess I used to think that way more whenever I hear someone try to introduce me a preacher in the Muslim world, like it's a big deal. Hence, when I came to think of it, nominal Muslims aren't really Muslims, so these so called brave missionaries aren't really facing the fatal challenges of the Muslim world...merely a cheap cop out of the greatness of their ministries.
But if I were to think deeper...it depends on who we meet. I've actually also met non-radical Muslims who are deep into the Quran. These are medical doctors, great family background, etc. Thus, it is narrow minded to be constraint by this false dichotomy of the Muslim world. It is true that there are plenty of liberal Muslims who don't know about the Quran one bit, but the other group is not just one radical group.
However, the "good" Muslims generally stay away from preachers...hence, if one does not engage in a wider social life, I think that's an ignorance that will lead to pride. Although, I do still believe that many missionaries today do not preach to these "good" Muslims out of fear, not to mention the radicals. Of course, Dr. Tong being an exception.