Because AOC gave them half a $billion to keep doing so.
First, AOC voted against the bill. She voted against giving them any funding.
Second, even if she had voted in favor of the bill, she's not the only member of Congress, so dumping sole blame on her wouldn't even make sense if the false claims were true.
But yes, let's eat our own over a political stunt by a racist conspiracy theorist (MTG). Those primaries won't lose themselves!
