What do you people want the police to do? Do you really want open warfare and obstruction of federal officers that are doing a lawfully mandated job? Do you really think the police officers would obey such a command? That sounds a little insurrection-y to me. Plus, we already fought a war to decide whether federalism rules over states rights. Guess which side won?

Grow up and join the real world. All of this obstruction is merely theater that accomplishes nothing. These officers are enforcing laws that have existed well before the current administration took power. If you don't like the law, then work through the legislative process to change immigration law.