Why do we constantly here this nonsense about how arresting criminals is "splitting up families"? Ok, I guess we only here about it in the case of illegal alien identity thieves being arrested.
Why do we not here about it other times? Because we all recognize that kids shouldn't be around their criminal parents. But in the case of criminal aliens everyone likes to pretend that they are just breaking that one silly law that doesn't matter anyway.
Just imagine how a child's perception of law enforcement changes when he finds out that mommy and/or daddy is a criminal alien. Imagine how it can enable the child to learn to justify breaking other laws because after all, mommy and/or daddy do it and the mayor of Portland applauds them.
Imagine the kind of company this child will be around because criminals like to hang out with other criminals. ID theft, rape, drunk driving and drug dealing: it's all ok because we don't want to split up families... as long as you are also an illegal alien.