Carson said in his book he had pathological disease, in the section where he described trying to stab his friend and attacking his mother with a hammer.
Hitting your own Mom over the head is a horrible, disturbingly disgusting thing to, which likely never even occurred to most people to even think about doing to their own Mom, but nonchalantly saying you are going to casually shoot down any Russian aircraft that violates your arbitrary "no-fly zone" over a chunk of Syrian real estate, as a possibly protective measure for a handful of refugees, may be even crazier. (As the old saying says, that would be penny-wise and pound-foolish.)
"Carson: If Russian Planes Enter No-Fly Zone 'You Shoot Them Down'"
Maybe this really should be Carson's new campaign theme / swan song, as he wisely brings a halt to his impossible quest for the presidency:
"Take This Hammer" - Leadbelly