I blame it on religious fundamentalists … if religious leaders taught their “flock” that being gay is not a sin. Read the bit from Wikipedia below
Religion in Russia is diverse, with a 1997 law naming Christianity, Islam, Buddhism, and Judaism as important in Russian history. Orthodox Christianity (Russian: Православие Pravoslavije) is Russia’s traditional and largest religion, deemed a part of Russia’s “historical heritage” in a law passed in 1997. Russian Orthodoxy is the dominant religion in Russia. About 95% of the registered Orthodox parishes belong to the Russian Orthodox Church while there are a number of smaller Orthodox Churches. However, the vast majority of Orthodox believers do not attend church on a regular basis. Gotta love those Catholics.