It’s literally just “be nice to people when visiting other instances, don’t behave like a dirtbag leftist unless you’re actually on Hexbear”.
Doing this will cause people to think that folks on Hexbear aren’t evil tankies. And that’s exactly how they get you. They act like normal, rational, mature adults with generally friendly fun-loving attitudes and… that’s fucking it, man. Game over. The Putinistas will have won.