While I kind of got a chuckle from the whole deal, I feel bad for both of you. It's clear that this guy has some kind of condition. People don't just do that. Whether he's got OCD, or accute anxiety disorder, or what, people don't just act like that. The guy has an issue or two...or three. That said, it doesn't give him any space to be a complete pain in your butt and tell you to give up a lifelong hobby. He needs to make an effort to accommodate you as well. Personally I would lose my mind if I lived next to someone like that. If my neighbor was always badgering me about my smokers it would drive my anxiety through the roof and just make it a miserable experience for me, even if I didn't care about their issues. It's probably a good thing you are ex LEO. I imagine you've gotten used to dealing with people like this and have a thicker skin for it.
That camera deal though...uh, creepy...