You have no chance of being detained for crossing the border illegally if you don’t cross the border illegally. You also have no chance of being separated from your children for breaking immigration laws if you don’t break immigration laws. Facts are hard.
You think any of these people care about family separation? If they did, they’d be upset about the collapse of the American family, which is measurable and real. They’re not. They welcome that collapse, because strong families are an impediment to their political power.