AITA: Neighbourhood drama

Going to my mailbox today I saw one of the neighbour's mailbox open with the key in. After waiting for a while nobody showed up. Trying to be neighbourly I thought I'd go and return the keys including probably the house key.

I went up to their storm door. I have never had any prior interactions with this neighbour. The couple inside SAW me and chose to ignore me, then tried to wave me off from the inside of the house like I'm a salesman at their door. I was like ok, rude but they didn't know who I was so fair. I started to wave the keys from the outside the storm door to show them why I was there. After forever they finally came to the door, not even opening it first. Then they opened a small crack of the house door but not the storm door and was like "that's the mailbox key?" I said "ya, I'm trying to give it back". And he said "Just leave it at the door thank you." like I was their secretary.

I'm baffled that they didn't even have the curtesy to open the storm door. Part of me was mad because nobody talks to each other in this neighbourhood and there is no sense of community. I was hoping to bring a positive change and was met with a cold shoulder. I just tossed the keys on the ground and left. The lady gasped "OMG" in disbelief.