Skinny shaming & Fat shaming are not the same lol. I will agree with you that both are hurtful but they're not the same. Fat people get bullied for everything & people see fatness as undesirable, ugly & unhealthy. We can validate skinny shaming without watering fat shaming down.

"For a fat person you're beautiful"
"You'll be more beautiful if you lose weight"
The little I can remember & not to forget how many people equate body fat to being unhealthy which in most case isn't mutually exclusive. It's not the same at all.

I also see alot of skinny women do that "all lives matter" thing. Shaming is shaming & the likes but recognizing someone has it worse than you doesn't automatically mean your problems don't exist. They do and are valid & we empathize with you. Fat shaming is worse honestly.