What's there to elaborate?
They condemn Russia for wanting to ensure the minimum of public decency, without street gay orgies like in San Francisco, they prosecute their own citizens who protest against immorality (like Echoes was banned for speaking his mind), they punish nations who dare to defend their land from Muslim aggression (Serbia, Israel), they evict christian god from their lands, they'll get a muslim one.
That doesn't happen in San Francisco, and that's not what the Russian law is targeting.
And Western Europe will severely limit immigration and move away from 'multi-culturalist' nonsense long before they're swamped by religious conservatives. Several Euro countries have already caught on to this trend and taken appropriate legislative action.