We do the same thing to them.
Like it or not, the Russians consider this their back yard, and they will not allow us to dictate what they will do. And unless we willing to risk war with a nuclear armed power over Ukraine, we won't be able to tell them what to do. And we aren't willing to risk it, nor should we. Even though we have the most powerful military force on earth, there is little we can do in this situation. Putin knows this, and that is why he is ignoring us.
Problem is China is watching this if the US doesn't do anything watch China try the same thing.