No (R ). Maybe people who voted for a particular government kind of do in some vague sense (I think rhetoric saying this is fine), but governments often encounter issues that the voters did not foresee and react in unforeseeable ways. People cannot be blamed for the actions of their governments, and certainly they shouldn't be held accountable for those actions in a court of law or anything.
True even though it is often the case that many or most citizens approve of their government's actions; approving is not the same as doing.
Would you say that the people of Germany didn't have any moral imperative to remove the Nazis from power in their government?
The people of Germany, considered as a collective? No, of course not, much as the people of the Soviet Union as a collective were not under a moral imperative to remove the Communists from power. Rather the leadership of Germany was under a moral imperative to stop making evil decisions which hurt others, including those they were (in their own twisted and misguided way) attempting to help.