I'm not for wide open borders.

Wide open borders prevent a functional government from protecting itself against neighboring dysfunctional governments.

They can cause massive strain on social systems especially if you're neighboring a failing nation. (Note that Canada has a more closed border with the US, than the US has with its neighbors.)

They can also cause massive strain on a nation's economy, especially one as unbalanced as the US's.

If you're going to have borders that aren't wide open, you do have to have the ability to enforce those borders, and that even means deporting some people.

However.

That doesn't mean that we have to be inhumane about it, or sloppy about it.

Separating families is an incredibly cruel policy, and shouldn't happen, end of story.

Deporting people that have no connection to their home country is often a bad idea.