Three thoughts:
1) It would have long ago died down if not for Donald Trump’s attacks on the family.
2) One positive consequence of the controversy is that it led Susan Kristol to write this thoughtful article about, among other things, being a Blue Star Mother.
3) I think a number of people, including Kristol, are misinterpreting a line in Khan’s speech. Khan, addressing Trump rhetorically, said, “You have sacrificed nothing and no one.” Some commentators have noted that Hillary Clinton hasn’t sacrificed any more than Trump has; Kristol points out that “of course we don’t require our leaders to have lost children in battle, or even to have served in the armed forces themselves.” But I don’t think Khan meant this line to compare Trump to Clinton; I think he was comparing Trump to Khan’s family, and to his dead son. The idea was, I think: You denigrate American Muslims as a group; that includes our family; and given what we’ve done for our country and what you have, how dare you. I’m sympathetic to this point of view. But whether or not you are, that’s what I think he was trying to say.
The Continuing Khizr Khan Controversy