There is no excuse for the current policy at the US border with Mexico. It was indeed changed by the current administration in April, regardless of how Trump tries do deny responsibility. His Attorney General and Homeland Security Secretary don’t run from it.
But while there is no excuse for this policy, it is important to note that it is not particularly different from the horrors that our immigration laws have inflicted for at least a generation, if not longer. It is indeed an attempt to fully enforce existing law, a series of laws never fully put into place because they do indeed violate basic human rights. Never enforced, that is, until now.
The current violations of decency and due process highlight a dance that the US has long had with human rights violations. When the music stops it is long past time for us to review not just this policy but every aspect of immigration and border control.