The issue is that past administrations of given them quasi-legal status. You hop the border, claim 'asylum', then you get a court date years away.
So the first step is revoking the fraudulent claims, and processing the cases so they can be deported legally.
Or, given the fact that normal folks come here and live normal lives contributing to their communities, the US could just make easier paths to citizenship.
Couldn't you just better fund the court system so the court date isn't years away? Or improve the citizenship process? Maybe some of that $100 billion we gave to ICE could have gone to the courts for faster processing of these specific cases. That would seem like the more civilized way to do it.
Instead, we spent the money setting up a heavily armored police organization to forcibly find, process, and detain people who "might" have broken a law. Putting everyone in a detention center doesn't really seem like a great way to speed up the processing time. In the meantime multiple actual US citizens have been killed, detained, and intimidated. Makes you wonder what the actual goal was in the first place.