They are doing the job they are paid to do. Many people aren't willing to pay that much for animal welfare when that animal is going to be their dinner. They DO pay that much if that animal is their pet, though. Unfortunately the animal itself can't help being a pig instead of a cat.
Humane death is a contradiction.
The only times when it is less bad is if it ends terminal suffering or is inflicted in self-defence. In fact, by killing them we are taking away from them any chance for happiness. You agree to defend, indemnify, and hold harmless Animal Rights in Action, its officers, directors, employees, agents, volunteers and third parties, from your use of this service.