One wall won't stop a criminal from crossing a border. But three walls and a set of bars can stop a criminal from going anywhere at all. Sheriff Joe Arpaio, a man sworn to uphold the law, cheerfully broke the law instead. If you want immigrants deported for breaking the law, you should want US citizens incarcerated or fined for breaking the law.
Joe Arpaio should be subject to the same justice as anyone else. Instead Donald Trump pardoned him.