When does a perfect Kodak moment between a mother and child become the target of instant online rage?

When the mother is Ivanka Trump, and the moment is posted to social media amid international headlines decrying her father's immigration policies – which have separated children from their parents as families seek asylum across the border from Mexico.

The First Daughter posted a softly-lit photo of herself cuddling her son Theodore to both Twitter and Instagram on Sunday, with the simple caption of "My ♥️! #SundayMorning".

At any other time, such a post might have gone without much notice.

But for the past week, Americans have been tweeting #WhereAreTheChildren after it was revealed the US government lost track of 1475 unaccompanied minors last year. These were children who had arrived in America alone and been placed with carers, who may or may not have been relatives.