Ok, so my kids are 18 and 21. DP is not their dad but we have been together for 12 years lived together for 10. As my dc have got older and found their own ideas and voices, dp has become more and more picky about how they are with him.
The latest thing is how dc's friends, when they come over, don't even acknowledge him or say hello. The thing is he does nothing to make them welcome. He will walk into a room where they are, or sit there, and say nothing and then tell me how rude they are for not even saying hello.
The way I see it...these are young adults and the type of friends they have are all quite quiet, and him sitting there in angry silence waiting for them to speak to him first is actually quite intimidating. They wouldn't speak to me if I was the same!
I think that you should welcome guests into your home by greeting them first, saying "nice to meet you" or something. And then subsequent visits there will be a hello and some chat. He has created an atmosphere of unfriendliness, and they have responded to that by keeping quiet and out of his way.
But aibu in this? He started this by wanting them to come to him (the great I am waiting for everyone to run to him) and it is a stalemate that needs resolving before new year when both dc have a few friends staying over. I am planning on telling him he needs to be friendlier but an prepared to see the other side, if I am wrong in this.