In general, I see 2 ways out of this situation:
1. Ban the discussion of politics at the level of the forum rules (I don't think this is a problem).
I believe that this would be the right decision. The temptation to express oneself on political topics is great; I myself succumbed to it, but this topic creates too much discord among forum participants and has also become a means of propaganda for different views. On other forums where discussions of politics and interethnic conflicts are strictly prohibited, there is no such mess in the off-topic sections, and all nationalities communicate friendly and equally. And there are special websites for discussing politics.
I advise you to delete this topic, ban the discussion of politics and interethnic conflicts at the level of the forum rules, and use strict bans (temporary removal from the forum) for some time to cool down particularly unruly users.