I'm confused. No punctuation, no spell check, barely any literacy. What is "yall yallself yall"? Sounds very arabic, but might just be an undereducated US american?
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.
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.