You cannot decide what is morally equal or not. Hate to bring it to you but you can't.
Arguably, each of us has a responsibility to decide just that.
Sorry but to me that is arogance and in a way ignorance.
What's arrogant and ignorant is the law in question, and attempts to defend it or protect Russia from consequences attached to passing it.
Again, we've heard this all before from defenders of this or that unjust law around the world. Apartheid? "How dare you judge us!" Saudi Arabia's draconian Wahhabism? "Outsiders will never understand!" Segregation in the States? "The South is the South, it's just our ways." Every one of those situations was changed or is being changed thanks in part to outside pressure.
Demanding that Russia be exempt is silly.
That some Russians will get defensive about it is predictable -- because of course they rightly fear that outside pressure can
make a difference. But on balance with the proposition of just sitting by and watching an entire population of LGBT people be brutalized, it really just isn't going to matter to the wider world if they get defensive. It doesn't matter how many millions of times they repeat blather like "other countries have bad laws" and "it's not for you to judge;" LGBT people in other countries have made vast strides in terms of being heard and having the freedom to be who they are in public, and if you really think you're going to tell them "just shut up while Russia treats your brothers and sisters there like it's the 1930s," you're nuts. And if you think you're going to derail them by implying that they're imperialists trying to oppress Russia*, you're nuts.
(* Of course I get why that comes up: being dragged prematurely into trying to "act like the West" is part of why the last couple of decades have sucked so much for Russia. So the notion of being "dictated to by the West" is repellent. And not all of Russia's issues with attempts at Western hegemony are fictitious; Bush's attempt to encircle Russia during his tenure was quite real. But people are going to have to learn to differentiate between justified issues and nutty conspiracy theory. The LGBT lobby is not some tentacle of Western Empire, indeed quite the reverse; there are no doubt still movers and shakers in the edifice of Western Empire who wish it would all go away. The CIA is not going to undermine Russia by "promoting" homosexuality there, and fundamentally I don't believe there are that many Russians who believe that that is actually a possible thing; gays are just a convenient scapegoat for other problems.)