It's not just emergent behaviour. Marxism encourages communists to rise up in violent revolution against their own countryman.

"A revolution is certainly the most authoritarian thing there is; it is the act whereby one part of the population imposes its will upon the other part by means of rifles, bayonets and cannon, all of which are highly authoritarian means. And the victorious party must maintain this rule by means of the terror which its arms inspire in the reactionists." - communist manifesto