If his objection is a religiously derived moral, as opposed to a religious taboo, that wouldn't work. You can physically insert it into him, but he would not be

If his objection is a religiously derived moral, as opposed to a religious taboo, that wouldn't work. You can physically insert it into him, but he would not be morally at fault since it wasn't his action. This would be like physically grabbing his hand and forcing it to slap his fellow prisoner with it. Obviously the person who slapped the prisoner isn't the CO but the captor.