One needs to remember one of the features of Trump’s mental illness. Other people, including tearful two-year-olds, aren’t real to him. All other people are just two-dimensional cutouts that populate his world. They exist only to fawn over him, or to act as tools he can use to get what he wants.
If Trump could attract bigger crowds at his rallies by bayonetting these children, or by ripping their heads off with his bare hands, that’s what he’d do.