“who was wearing an official service dog jacket”
I’m not saying that the service man’s PTSD is not real or that his dog is not really a service dog, but there’s no such thing as an “official service dog jacket”. Anyone can buy one for any dog.
If a person suffers from a disability and the dog is trained to perform a task, then it’s a service dog, even without a jacket, and if not, putting a jacket on it does not make it a service dog.
No, but it does make it well dressed.