Putin doesn't allow Russian citizens to "demand" anything. Saw on the news today that a demonstration against the war in Moscow ended up with the demonstrators beat up and 1700 of them thrown in jail. They'll probably get sent to Siberia and never be heard from again, just like in "the good old days" of the Soviet Union.
At my age I remember the talk that a "Hitler" could never happen again in these modern times, that we (modern society) would never let it happen. But now that it is happening, most people just shrug and, as long as it doesn't really affect them too bad, let it slide. Does Putin really care about "sanctions"? The Russian people may suffer and even starve but you can bet Comrade Putin will be living comfortably.
I think Putin should be put on trail, aka Nuremburg, and declared a war criminal. Even if it is in absentia. Thousands of people are going to die solely because of his empire building. And you can bet China is watching to see how the world will react; Taiwan may be the next to suffer.