Yes, let's have no federal immigration enforcement entity in this country, novel idea.
It's actually a relatively new agency and clearly not effective.
Also, the abuses and violence are staggering. And they managed to deport or mistreat actual citizens, because they did not cared. Again, not effective.
Here is the problem - conservative and right wing people use "effective" as euphemism for "we want to see as much cruelty and abuse as possible".
1. Have an enforcement agency going around killing people, and locking people up who have valid reason to exist in country waiting for status updates.
OR
2. Complete anarchy and chaos, monkeys flying planes, elephants driving taxis, dogs marrying cats.
Actually you know what, I reckon give the elephants a go.