Yep - sounds like he's looking for places to project his anger! I see the same sort of thing in my h. He is stumbling around, makes a lot of errors and then blames it on others.
Ordering a gift 1 day in advance and then blaming Amazon? Does he think Santa is going to drop it in the chimney while the reindeers chomp on a few carrots? Those poor customer service people!!!
The fact that your h asked you to have your son call your in-laws made me think he wanted you all to make peace.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced