'Military types need putting back in their cages until they understand civility.'Military types work for the Ministry of Defence, not Offence. They are very civil and in many cases highly educated.
What has not been raised on this thread is that our Armed Forces are not in Afghanistan on their own, or just with the Americans. They are there as part of the ISAF, which is a NATO coalition, so troops are there from Denmark, Germany, France, Australia, Canada, to name but a few. ISAF is mandated by the UN, so it isn't just the UK and the US rushing around for no reason, or because they are gung-ho, but because a failed state (and that is what Afghanistan was, Pakistan is heading towards and has been for some considerable time, and Somalia is), destabilises the region around it and the effects of that spread outwards.
It is no secret for example that there are those in the Pakistani Security Services who support the Taliban and funnel funds and materiel towards them. If we're looking at Afghanistan, then they hope we aren't paying too much attention to what they are up to with India and Kashmir.
In response to the OP, had I said anything like that to my sil when my brother was in Helmand, my Mum would have marmalised me, and so would my sil. It makes no difference if they are in Afghanistan or deep under water on patrol in a submarine - they have to give their attention to what they are doing, as not having your mind on the job can and does have fatal consequences. Yes, I'd prefer that dh and db never went away, but it's what they do, what they joined to do, and I am bloody proud of them when they go to sea/on deployment.
For those questioning the age at which some join up - my DH joined at 18 after A levels, had his degree paid for, and will retire at 53 having served the best part of 35 years. He has had a fantastic career, stimulating and varied, and will leave with an excellent range of transferable skills. That's more than many jobs give you.