Nothing really to wonder about, I think. He was a paranoid man, who wouldn't even trust one of Ueshiba's students to hand him tea without demanding he taste it first. In a recent little article on AJ, I believe, neighbors in his home town described how if they crossed the property line, he'd chase after them and assault them (with many of them getting dislocated arms or wrists).

During training Sokaku Takeda sensei would never allow techniques to be applied to him. Because of that, in front of Takeda sensei I only practiced in applying techniques to others. I was told “Would a Bushi ever allow a technique to be applied to them?” by Takeda sensei.