Somebody got to Kirstjen Nielsen to make her the defiant cheerleader for the most inhumane government policy since Japanese internment.It was just weeks ago that on the issues of separating families at the border Nielsen was more on the side of Mrs. Trump than Mr. Trump. But that was before she learned that showing any ambivalence about zero tolerance and all it entailed was the wrong side to be on. After a tongue-lashing from Trump the likes of which staffers in the room had never seen, she considered resigning, according to friends, but buckled to his will instead.