According to the International Justice Resource Center (emphasis mine):

No, it’s not specifically on that list. Here’s what is:

It’s not a crime against humanity to cause mental or physical harm.

From UNHRC’s Website:

I’m having trouble understanding how providing refugee children with warm and safe accommodation is abuse, much less a war crime or crime against humanity.

Nice rant. Do you feel better?

Where would you suggest they put the children?

The US is providing children who arrive at the border with room and board while they find a place for them to go. That’s not a crime against humanity and it’s hysterics to suggest as much.

Ok. What Crimes Against Humanity are being perpetrated in the US right now?

What war crimes have been committed?

Would you prefer these children be sent to jail with their parents?

The reality is, they are being given a warm and safe place to sleep while their parents are processed through the justice system. When they have relatives in the US, they are released to those relatives.

That’s a good point.