OP, your reasoning is superficial, ill-informed and utterly without compassion. You decry the motives of recent conflicts....the political motives and then extrapolate in order to indict the individual servicemen and women involved.
The loss of any servicemen in pursuit of their duty is a tragedy, drop the politics and just see this. See sacrifice, regardless of your take on the political context, see families devastated, see colleagues knuckling down despite grief and fear. YOU have politicised this in order denigrate. Shame on you.
Having covered the political context, if you have questions over conduct on ops then again you reveal the depth of your ignorance - rules of engagement are tight and are triggered by attack, not servicemen going out to kill. The mission in recent ops is far more likely to be supporting local gvt, establishing security to engender economic recovery and allow locals to live in a more stable environment. Girls are at school again in many parts of Afghanistan because of this. Oh, and our right to be there? Invited by the afghan gvt if you could be arsed to do your research.
Oh and by the way Just because someone has this crap that you are pedalling published does not legitimise the logic.
Just remember them all, all have given their lives, many without any particular view on the politics, many of them so young. Don't sully them with your half arsed polemic.