I don’t think it’s as black / white when it comes to implementation as you suggest. Let me know if you know more, but it seems from my uninformed opinion that if the state laws don’t follow the federal law, state agencies don’t need to enforce.
Turn state / federal law around for something a bit better to think about. Looking at cannabis legalization, many states have legalized it, though it’s still illegal federally. As you state and listed in the Wikipedia article, the states choose not to have their police agencies enforce the federal law. But federal law enforcement could come in and enforce it (they just have chosen not to).
I think it’s a safe assumption that will work in the same way here? Maybe the federal government will choose to enforce their law over the states here? Not sure, but just my take. Not trying to defend this, I just wanted to call out and question how state law differences from federal don’t seem in practice to make much of a difference.