I would be very happy for any of my children to be in the Woodcraft Folk. Or the Scouts. Or the cadet forces.
I believe all these organisations are 'forces for good' in todays world.
If you look at 'Scouting for Boys', published not long before the Great War, in amongst all the excellent ideas it does contain some scarily jingoistic stuff, some rather racist threads, and dire warnings about harmless teenage sexual behaviour. The great enthusiasm for war in 1914 is understandable when you see how people thought in those days. But I wouldn't judge the modern scout movement on the basis of it. They have kept the good stuff and got rid of the wackier bits (indeed may have gone too far with health and safety/risk avoidance, but that's society's fault, not the Scouts)
The Air Cadets started during WW2 with a purely military objective: to provide the RAF with partially trained airmen. The focus is now more on developing good citizenship, life skills, leadership skills etc. There is some military training but I believe joining the armed forces of a democratic country is a good and honourable thing to do, so I have no issue with that. I did 4 years with the air cadets and loved it.
The Woodcraft Folk was originally obviously a response to the Scouts-as-they-once were. I think it's good that they have kept some idealism about co-operation (which does not have to be a left wing idea, all the parties are keen on it). This Reds-under-the-bed stuff sounds like paranoid prejudice to me.