Because they don't want to enforce the federal law either. It probably wouldn't hurt their feelings any if the federal immigration laws were struck down too. This will kill two birds with one stone. Their main dilemma internally is finding a liberal court crazy enough to make it happen the way they want. 9th Circus here we come!!
But we don't need judges to be able to read and understand the words of the Constitution.
And we know what it says in Article 4 Section 4 about protecting the states from invasion.
Of course, it gets sticky when you have a class of marxist traitor moles in the highest places, to tell us mere peasants that the sky is green, etc.
Think the 9th Circus will read it before they rule on it?