House next to us has been empty for months. This afternoon I went to collect DDs from a party. When I went out the front door and I saw a removals van, couldnt see alot due to low sun in my eyes and didnt really want to look as they've all their belongings out. While loading DS into car, a man and woman appeared, I stuck my head over the car, said "Hi" they responded with a "Hi" and I drove off.
I return home and huddle DCS into the house as they are very nosey and ask 101 questions, I thought I would ease the new neighbours in gently once they have settled.
After a few minutes back home I hear a knock at the door, its the new neighbour. They have decided I am very rude to not welcome them and I have upset his wife. She's decided it's now a bad neighbourhood and wants to leave. Based on one 5 second interaction and 1/2 hour of me knowing they are there.
I explain I was busy collecting DCs and didnt want to disturb them while they are actually moving in.
He goes on and explains the only option is for me to go and apologise for my rudeness and go and get to know her. He said something along the lines of 'I expected more but that's the minimum acceptable'
He went to leave after my 
face and telling him I was busy with DCs but maybe I'll see them soon once things aren't so hectic for both of us. She then appeared at the door step, gave me a look of 'I'm waiting for an apology' then muttered "what's the point, she's left you on the doorstep" and stropped off back to their house.
I know moving is stressful but surely you don't confront your neighbours 'rudeness' within 1/2 hour of arrival.