Are you sure that you're an "ex" Dem? You seem to still be able to make up facts based on nothing. Of the 1.6 billion Muslims worldwide, 1 billion are in Asian, and 500 million are in Africa/Middle East. Less than 80 million are in Europe or North America. The largest populations are in Indonesia, Pakistan, and India. Those are not white/Caucasian nations.
Those Muslims in Eurasia are Caucasian, and yes, they do come in the blond hair/blue eyed variety. Some Indians and Pakistanis are very dark skinned, but they are still Caucasians.
I do not use the UK trick of calling Caucasians who live in that part of Eurasia “Asians.” Asian is a different racial group, which covers much of eastern Eurasia, as well as Pacific islands. I think that Asian Muslims are a minority of Muslims.
Sub-Saharan Muslims are also not Caucasian. They are black, and also are only a fraction of Muslims.
The fourth major racial group, Australian aboriginals, do not, as far as I know, include many Muslims.
And yes, I do study human migrations. It is not my area of scientific study, but I find it fascinating, so I do read the scientific research papers on it.