[Jetliner]

For Trigger - sounds like there's more to this than maybe you understand. I seriously doubt the pilot just said "I'm not going to take them because I just don't have time."

I know that some airlines in the EU have a restriction on the total number of disabled passengers that can fly on one flight for safety reasons. I'm wondering if that was the case here, and keep in mind that disabled does not necessarily mean in a wheelchair. And if the ground crew made and error and had more than the limit of disabled passengers, then it's possible the pilot might have let them have it. It's possible that your mother misunderstood what was happening. As for unloading the bags, that is simply a security regulation throughout Europe - if the passenger does not board, the bags cannot fly.