I always found people who joined the cadets at school worrying. An interest in dressing up and cheap camping holidays seemed flimsy excuses for signing up for a game whose logical conclusion was killing fellow human beings.
I always found people who took up hunting suspect. Indulging in blood lust as a way of passing your days off seemed a small step away from being a psychopath albeit concealed behind a veneer of landed gentry aspiration.
We should trust our gut instincts and say something. Call them out on their aberrations. Draw them back to their inherent but forgotten peacefulness.
I keep thinking that someone, sometime, at a very early stage, should have taken Putin aside and introduced him to the possibility of not being such a wanker.