It's a relatively new agency in name (2003), but it's not really all that new. It was formerly known as the Immigration and Naturalization Service (INS) and U.S. Customs.

What would an effective immigration enforcement agency look like, in your opinion?

I think we can agree that when they're executing innocent citizens in the street, the agency is no longer effective.

I agree with you. What would an effective immigration enforcement agency look like?

A little know fact is that Biden deported more illegal immigrants then previous presidents with smaller budget and without killing them. He also deported higher amount if actual criminals in the set. So, you know, whatever before ICE is now was more 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".