I think the implication is that he sows conflict between nations, or just sows conflict in general.

I know nothing of the Rassemblement National or how that would help them. I have heard accusations that Russia intentionally creates conflicts to destabilize opponents and draw attention away from their own dealings. Perhaps that is the implied link with Russia.

I don't really see anything here to support that. Personally, I think the guy just doesn't particularly care if conflict arises in the course of him pursuing what he thinks is right. That's not really a heinous characteristic; it's often considered admirable.