The legal reasons is the sanctions against Russia for their illegal war of aggression. All of Russia and all who live within its borders are responsible for these actions.
There is something beautiful about how U.S. news outlets were always going on about how Russia is a dictatorship, with rigged elections, where you'll be beaten, arrested or killed for protesting or speaking out--Russians supposedly have no agency. And yet simultaneously, now, Russians apparently must be held accountable for everything their government ever does, because they "voted him in" or "should overthrow Putin".
We can't have it both ways. Either Russia is a functioning democracy (which I don't personally believe exists anywhere but that is another topic), or perhaps the average person does not actually have very much say in such events.
Sanctions are meant to harm innocent people as much as possible, on purpose, with the idea being that it will cause so much unrest that the government either caves to the pressure or the people revolt. While I find that very sick in and of itself, I would at least appreciate it if we were honest about that rather than making contradictory moral statements.
That said, worse yet, almost hilariously, I cannot think of a single time sanctions have ever truly worked in a situation even remotely similar to that of Russia. Just think about countries like North Korea, Iran, Cuba, Syria, etc -- like it or not, these countries have not toppled as a result of the sanctions. Do they hurt? Yes, of course, but they evidently do not destroy nations the way we believed they would.
Instead, the innocent are hurt, as was the intention, yet the goal never gets achieved. North Korea still has nuclear weapons, and all we've done is force Iran to develop its own industry, such that, ironically, it is now capable of sending weapons to aid Russia.
They have had a century to institute actual democracy. If 70% supported deposing Putin instead of the war it would be difficult for him to retain power or he would have to change tack to retain control and keep his skin intact.
We didn't think of the poor Germans when we burned them alive as part of the effort to stop the Nazis and few argue that the Germans aren't collectively complicit save only for those who actively resisted.
I'm fully willing to hold blameless those who burned weapons and recruitment centers, spoke out publicly against the war within or after fleeing Russia, shot their commander, or surrendered to avoid an unjust fight.
I'm aware those are all extremely risky. I know exactly why someone would want to keep their heads down and I none the less blame them no less than I blame all the good Nazis who didn't believe in the ideology but kept their heads down while Jews burned in ovens and their neighbors rotted in battlefields and economic consequences are the least of what is just and fair.
A million people are dead including many of their own they are complicit.
People who will suffer economically under sanctions or in this case from exclusion but who if the war isn't stopped may suffer explosive dismemberment or see their kids come home in a box.
