you got some serious daddy issues if youre gonna stab someone over where you can walk your dog.
carrying a pocket knife will be considered a concealed weapon. if you don't have a permit, you'll be fucked.
assault with a deadly weapon is a felony.
tell him to fuck off. cus him out and wait.
if he attacks you, let him rough you up, report him to the police, and you'll probably have enough ammo to get him thrown in jail and evicted from the property if your landlords consider your complex a half decent place. either that or youll have enough for a restraining order, which if he violates he goes to jail.
either one of these will get the big buff black guy off your back, problem solved.
the other idea, the stabbing, will only get one big buff black guy off your back, and get you another in his place, only the second will be using your asshole as a pussy.