Muslims
Oh, I was going to say liberals.
Being from Bangladesh, it's likely the author started out as one of those.
However, it appears he's an apostate. On his Twitter page, he characterizes himself as "Evolutionist. Geneticist. Atheist. Reactionary." He's a grad student in genetics. See www.vetmed.ucdavis.edu/Catgenetics/RKhan.html. He wrote an article entitled Old Europe's Obit for the American Conservative.