Nobody is being forced to die for any cause. Ukrainians are fighting Russia because Russia intends to wipe their country off the map. I don't really see why you think you have the right to tell Ukrainians that they don't have the right to fight for the existence of their country.

Ban, defederate, whatever, I don't mind the method – I do not want this server to have these "people" on our server and able to interact with/see us.

What is the ideal resolution for a community banner so as not to unnecessarily 'weigh it down' with a super high-resolution image?

I don't think he's completely wrong. A lot of people felt similarly. I know SkillUp felt similarly that if you had a really good PC and could overlook the (unforgiveable, admittedly) bugs, it had a lot going for it.