What would happen if the Russian President was killed?

I dont know much about communism.. Does the whole gov fall apart when the leader (or who they consider a “god”) dies...? And what about his “group”, do they just take charge and keep doing what the president was doing or do they say “thank god the crazy ****** is gone” and change...? What I’m trying to ask is... show more I dont know much about communism.. Does the whole gov fall apart when the leader (or who they consider a “god”) dies...?
And what about his “group”, do they just take charge and keep doing what the president was doing or do they say “thank god the crazy ****** is gone” and change...?

What I’m trying to ask is would you have to kill a bunch of top gov people to change what the country does, or just kill the leader?
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