Deimos was sort of dancing around the subject, wasn't he? Either that or he was incredibly dim to not know that Zeus mean his specific purview, not his vague one. Any idiot could see that the boy considered himself an aspect of war and therefore felt the need to fall in line with his father. And Zeus was far from being an idiot. “So, you consider fear and terror nothing but an aspect of war, then?” He was trying to make the boy think. There were so many uses and layers to what he was. But, if in the end, Deimos wanted to be remembered as nothing more than someone Ares ordered around like a dog, that was his business.
Zeus could only do so much.
But he wasn't quite ready to give up on his grandson yet. “And what of love, Deimos?” For as much as Deimos was Ares' son, he was equally Aphrodite's. “Is fear not also an aspect of love?” It was encouragement he was trying to offer, a way for the boy to earn a greater place for himself. Something greater than being Ares' dog to order around.
“Is not fear an aspect of many other things?” Zeus had hope that his grandson would think before answering, realize where he was going with this. Certainly there had to be something inherited from his mother.