Because, frankly, Khizr Khan has done more good than anyone could have expected. When Trump started attacking him and his wife, he unleashed a fierce, moral advocate who has done nothing but hurt Trump.
This morning’s article
Khizr Khan, Father of Fallen U.S. Soldier: Trump Lacks ‘Moral Compass’
Says exactly what needs to be said but which a regular politician cannot say.
FWIW, Trump is actively being a bully – a presidential candidate personally attacking the parents of a dead soldier? There’s no way this looks good for him but he keeps doing it.