It wasn't that they were invited, it's that they showed up. I can understand a CEO not going full on resistance mode, but how hard would it be for them to just say "sorry but I'm going to be in Tokyo (or wherever) that day so I can't make it to your dinner"?
It would be fairly easy for them to be neutral, which is what I'd expect from a CEO. But nope, they're all on board the Trump train.