never understand why users r so sensitive

lurkin on posts and see some1 say “a regular made a fatphobic joke and it was aimed at me” for it not to be aimed at the user and the comment is “dont argue with some1 who has no chin”

question is how is it fatphobic if fat/plus size user still have chin even being fat/plus size

am not d riding them it just why think it fatphobic unless am missing something