My cuz & I watched an old movie. In one scene a chubby boy said something silly and my cousin said 'He's pretty chubby.' Later, an overweight person had trouble getting out of a telephone booth and my cousin laughed.. "he can't even get out" Then I was annoyed "so you're just hating on fat people." "no i'm not" "what about the chubby kid then?" He said "but it's funny" I was pissed. My cousin used to be a chubby kid growing up until he was about 15/16. Why does he act like this?
Our culture is very powerful at fat shaming. Despite your cousin’s personal experiences, society is constantly messaging him, and all of us, that fat people deserve to be laughed at and shamed. He may have internalized a lot of that messaging. And since he’s no longer fat, he may disassociate who he is today from who he was then as a totally different person- one who society says it’s still okay to make fun of.