It's complicated, because the government position on it is a few 'valid' concerns backed up with a lot of irrelevant bullshit about long-dead history. Practically, nobody is going to be stopping this. By deciding on sanctions, everyone in the west made it clear that it doesn't want to fight a war, and the regime is currently too secure to be threatened by internal dissent.

The best realistic outcome at the moment is something similar to what happened to Georgia - occupation of the two territories, a referendum, annexation, and an end to the proxy war.

Whether we are going to get that outcome, or something worse, is, of course, unclear.