Which countries are using the military to enforce laws? Which countries are denying due process? In which countries is the executive branch ignoring court orders? In which countries is the executive branch claiming the powers of the legislative and judicial branches?

I have no doubt these countries exist, but I'm deeply skeptical that they are imitable.

So again then, why is the government not going after employers? Does the government only go after street level drug dealers but never anyone higher?

Uh, no. This is about illegal detainment of people (some of whom are citizens) by federal law enforcement. The overwhelming majority of citizens want a functioning immigration system (and a functioning criminal justice system). What I and others won't abide is law enforcement violating their oath and illegally detaining and deporting people.

Obeying illegal orders to attack American citizens on American soil is certainly something, but it isn't law enforcement.

If this were actually about law enforcement, we would have passed the bipartisan border protection / immigration bill that has been on the table for eons.