Richard Cohen at the Post explains Trump.
… Read the restTrump does not possess an ounce of compassion. He is reptilian, knowing only to show his fangs, hiss and attack. This is why he mocked a physically disabled reporter for the New York Times, why he derided the heroism of Sen. John McCain (R-Ariz.) and why he dismissed the authenticity of the Khans, who had lost their son in Iraq.
This inability to feel the pain of others — even to acknowledge it — is not a minor tick in an otherwise good man. It is the salient characteristic of a sadist, of someone so wrapped up in himself that he has contempt for victims. Trump’s name for them is “losers.” They