'They are all Chinese' Listen you fucking dickhead it's your business for deciding that 'Chinese' is a language instead of a LANGUAGE FAMILY and using the same writing system doesn't mean they are the same language
No one's saying that Cantonese is special for being a separate language while other Wu & Min etc. are dialects. If you think admitting there are more languages spoken in China than you knew is treasonable then that's on you.