Children are generally not separated from their parents when their parents commit non-violent minor offenses
Dragging children across two thousand miles of desert and multiple borders (where many die en route) is far worse endangerment.
When compared to your cushy first-world existence, sure. Some might consider continuing to try to raise children in abject poverty permeated by narco-terror to be endangerment. As usual, it comes down to whether you think any random stranger from these countries is likely to be a bad person or likely to be a good person. I am happy that I see goodness in others, and I feel sorry for those who live the other way.
Would you say the same thing about children dragged across the Atlantic Ocean on cramped boats to arrive at Ellis Island?
I really don't think "endangerment" is a reasonable description of this situation. Parents are doing it because it's what they believe is best for the kids, because conditions are more dangerous where the kids are.
This is literally what's happened to thousands of children. We don't know exactly how many. And before another person carelessly posts some sentiment about how this is okay, I hope you also take the time to do some real introspection.