It would benefit from a period, and I can't tell if they're trying to be sarcastic, but the use of y'all is fine. Y'all is an American-English word most similar to the Spanish vosotros. Y'all's-selves is a more specific dialect mostly found in the US south east, but it is a word too. Y'all fills a hole in the language and I don't get why people hate it so much. Y'all's-selves really only serves the purpose of adding an emphasis on the collective nature of yourselves.

Yall-qaeda

What is "yall yallself yall"?

Those are their pronouns, duh

I think what the commentor is attempting to do is point out and make fun of is that Americans only care for right now and within a few election cycles America will stop providing financial support to the Ukraine.

Yall just jealous that the American southern dialect is home to one of the most versatile pronouns on the planet. Singular, plural, gender neutral, and easily contractible (yall's, yall'd, yall're). Even the queer community wishes their pronoun game was this tight!