i ordered from them on day 1, and was totally annoyed that they didn't provide an ETA, closed for 2 weeks, didn't refund my money for 2 weeks, and was unavailable for two weeks. they could've hired non-religious people to handle affairs during the jewish holiday, and there's no excuse for ignoring customers for so long. i ended up just buying the watch from the apple store but i had to drive many hours to get it.
I can see why you're annoyed but for B&H, selling Apple Watches on release date is not their primary business... they sell mostly camera equipment and some computer stuff... Yeah, they're losing out on some business by not being open during the holidays, and yeah they're holidays are lengthy, but that's their prerogative. I agree their customer service could be better surrounding these types of popular release, but 99.99% of their products don't have some crazy release date fanaticism that surrounds Apple product releases and it just might not be worth it to them to open their stores during this time. Also, it's not like they kept your money.. you cancelled... they returned your money. I don't see that they did anything wrong except not catering to your obsessive need to get an Apple watch within one month of release.