Actually, chatting in this strange and bizarre group of advanced civilizations every day is enough to understand a lot of things. There are always leaders from various fields appearing to inventory their own civilizations. Like any civilization, they all have a brilliant past and enticing cuisines.
Naturally, there are also civilizations with conflicting beliefs here, but everyone has reached this point, starting to explore the stars and seas, so no one deliberately offends. At most, they casually praise how good their own civilization is.
It's understandable, right? Who wouldn't like their own stuff?