If they were to allow Texas to do anything it wanted then sure, you'd be right. Some governors saying they side with Texas against the Supreme Court (when they aren't technically violating what they've said yet) doesn't mean anything.

The Supreme Court says the federal government can cut through the razorwire to reach where they need to reach. It doesn't say Texas can't put razorwire up, so they haven't violated that. It's 100% nothing for now. If Texas decides it wants to turn it into something and stop the federal agents from doing their job, then it becomes something.