Never called Trump Hitler. I called him a fucking retard, which he is, in point of fact.
The separation might have been lawful. The laws in place that allow it were supposed to be applied when there was a perceived threat to the child. Starting with Trump's policy, they applied that to every single child that crossed the border. Even if it's not illegal it's a misuse of power. What was ruled to be unlawful was the indefinite detention of children who crossed the border with a guardian. The reunification was court ordered. If the federal courts didn't step in, thousands of children would still be separated.
So it was an unlawful separation of children from their parents without the parents consent. We can call it that, but abduction is a lot shorter.