Okay, I guess. But particularly now having seen what the Trump administration has (successfully) done to Harvard, Columbia, and a wide variety of other universities -- over far less "egregious" conduct -- I would not want to be in the position (as here) of hiring undocumented immigrants at the University of California, likely in violation of federal law, and then just waiting to see what buttons the federal government decides to push to punish me for that decision.
But the Court of Appeal says that fearing backlash -- including lawsuits -- by the United States isn't a good enough reason to refrain from hiring undocumented immigrants, so unless either federal courts or the California Supreme Court step in, I guess we'll just have to see how this one ultimately plays out.