A direct quote (or as direct as it can be given it's published by the Fail!) from the defendant:
And if you have to defend your patients, you need to be fully conversant with the tools to carry out that task. If he's working in a field hospital that gets attacked and doesn't know how to use his rifle properly he's going to be pretty useless for anything but running and being shot in the back. I could see his point if he was sent on active service whilst awaiting his appeal, but even operating in a non-combat capacity he would still be military personnel and should be trained appropriately.The Geneva Convention says medics are non-combative and we are only allowed to protect our patients if we have to.
The sentence may be harsh, but refusing an order from a superior officer is never going to go down well, and whatever impact participating in rifle training may have had on his conscientious objection appeal, it wouldn't have been half as bad as this...