Exactly. Blame the parents, not law enforcement. Every criminal sent to jail gets separated from their children. That’s not law enforcement’s fault, it’s the parents’ fault.
Also, just because they have an “anchor baby” in the US, doesn’t mean they can’t go with their parents who get deported. Separation was the parent’s choice and they should be required to take their children unless they can arrange for someone else to take care of them in the US.