The percentage of “mistakes” is very, very low. The overwhelming number of people they arrest are criminal illegals. A smaller portion of just plain illegals. A miniscule number are mistakes. In other words, they are doing exactly what they should be doing.
As far as shooting people, it would be smart not to resist, obstruct or harm law enforcement, particularly when they are in the middle of an arrest, but what can I say, half of your cult operates at an intellectual rock bottom and the other half is still digging.