These people are not actually committing felonies - and that is what makes the child abduction so inappropriate and over the top.
If they were felons then yes - it might be appropriate to take their kids from them until they are through the justice system.
But they are not felons - they are just normal people trying to immigrate into America just like millions of other have done over the years.
The outsized punishment for the misdemeanor crime is why Trump has to bring in "Angel Families" in an attempt to somehow justify this injustice.
The point is they are being arrested and charged and incarcerated for lack of bail or surety. That is why the children are being taken into state care, as would happen for anyone incarcerated who had no other family to take care of the children. This happens every day across America.
And they are not 'normal people trying to immigrate to America' but illegal aliens who deliberately violated the border, paying people to sneak them across.
It is the unwillingness of congress over the years to do anything about the porous border which has, in large measure, driven support for Trump. Without this issue, without "build that wall" he might never have become president. To you, perhaps, illegal immigration is not an issue, but it is to many, many people. To the majority of the population, in fact. We see the response to the state not dealing with it in Europe now with the rise of extreme right wing parties, now starting to move into governments.
A line from David Frum seems appropriate here. "When liberals say only fascists will defend borders the people will hire fascists to defend the borders."
Note. No, I'm not saying Trump is a fascist, since Trump has no coherent political or ideological beliefs.