Well they’ve made up big chunk of Russia for centuries and currently out-birth native Russians, who are facing a major demographic crisis due to catastrophically low birthrates. Russian Muslims also don’t suffer from the alcoholism that’s contributed to the high male mortality rate in the country for years. (It’s changing now, but for awhile 1/4 of Russian men did not live to see age 60.)
I was deployed to Uzbekistan where the Muslims liked their vodka & not a hijab in sight. That was after 70 years of secularization, of course.
Wonder what the secular-to-jihadi ratio is among Muslims in Russia now?