Apart from what we think about gay marriage - what happens in Russia is a completely different thing. The new law against gay propaganda is (like so often in Russia) a rubber law. You can easily lock up people for allegedly propagating homosexuality. It may be enough if two men hold hands in public.
How would they have dealt with the kiss of Carter and Brezhnev? And how do they deal with special forces "Omon" who turn their backs to a mirror?