But, Trump is more Archie Bunker than Dr Welby.
From all I heard during my years in NYC, Trump is a generous and decent human being.
The reason he is attacking Carson in Iowa is that Carson has invested a lot of personal time in Iowa and could conceivably win it. Trump needs to increase his lead if possible.
As an aside, that idiot Lawrence O'Donnell said that when he was in the hospital in NYC, Trump was the first person to call. Previously, O'Donnell had never said much nice about Trump...now he gushes about Trump.
Trump is playing a character, and he knows playing that character works to a degree.