He is far from an idiot, but he is blind to the linkage between Israel and the US. He, like too many Americans, would sell Israel down the drain in exchange for Arab supremacy over Israel. I don't know why, I can't begin to guess his motives and I sure as hell don't agree with him, but an idiot he is not.
You should not confuse the ability to contemplate to be the same as brilliance, indeed the lack of hesitation to contemplate the absurd or unacceptable is the opposite of brilliant.
For example, the pros of killing everyone over the age of 75 could take hours to fully contemplate, the spread sheets could be masterfully done, the deep intricacies of how it could send a financial spider web of benefits throughout the economy could take years to fully understand. And yet, I find those that dismiss the thought within seconds to be the truly brilliant ones.