You are the only one to have brought race into it.
I feel it's much more likely that they wouldn't hate Wanda if she had always been an X-Men. It's always seemed to be more of a thing about her not having spent that much time with the cause.
I've never seen once someone on this board even hint at hating her because she's Romani. That's something that you decided to weaponize and I'd appreciate it if you'd stop.
About the allegory. It has always personally failed to me that they were mostly white and straight. But I feel that's something that has slowly improved. And like with most things of similar vein in comics, could always use more.