It's not that the fash are RIGHT, but they also weren't right when they nuked Roe, or Affirmative Action
It's that if Abbot SAYS "I'm doing a secession/usurping federal authority because you broke the compact" and then he can get Biden to say "the hell you are" and jump first, he's now given SCOTUS plausible deniability to overturn the entire Arizona v U.S. ruling and begin unwinding federal authority. This case will then be used to make other cases, with SCOTUS curtailing federal power broadly