I will preface this by saying I have zero hate for people enjoying themselves without harming others.
When someone injects extreme representations of themselves into every encounter they have with no regard for context, it can be frustrating. It's off-putting to be having a typical conversation and suddenly have someone use RP text. It's not the culture that is off-putting, it's the out-of-context actions.
I understand that for some, social cues and context around conversation might not be as clear or understood. I just personally have a hard time handling a conversation when the other party is suddenly RPing as their fursona outside of that space.
Just because someone doesn't understand that is no reason to have some sort of extreme hate towards them though.