I’m Orthodox and have a lot of respect for the Russian Church which survived the most brutal persecution in the history of Christianity and is one of the few churches that is firmly holding its ground against the tide of relativism and secularism as well as Islamo-Facism. But... this guy has a reputation of long standing as a nut job.
Russian Orthodox 15-20%, Muslim 10-15%, other Christian 2% (2006 est.) note: estimates are of practicing worshipers; Russia has large populations of non-practicing believers and non-believers, a legacy of over seven decades of Soviet rule
Muslim 70.2%, Christian 26.2% (Russian Orthodox 23.9%, other Christian 2.3%), Buddhist 0.1%, other 0.2%, atheist 2.8%, unspecified 0.5% (2009 Census)
Muslim 75%, Russian Orthodox 20%, other 5%
Sunni Muslim 85%, Shia Muslim 5%, other 10% (2003 est.)
Eastern Orthodox 80%, other (including Roman Catholic, Protestant, Jewish, and Muslim) 20% (1997 est.)
Armenian Apostolic 92.6%, Evangelical 1%, other 2.4%, none 1.1%, unspecified 2.9% (2011 est.)