Say what you will, as I have stated, our troops there know the score and to date have re-up for the misison. It is an all volunteer force and that is something you cannnot escape.
The fact is also, we have not been hit again because these isamic jihadists have been too busy hiding in hole in the ground and fighting in their own backyards to effectively put large scale operations in place to come here, and that is definitely in the vital interests of the US.
I also know this, from talking directly to Afghans and Iraqis (both of whose populations have made more sacrifices in blood in this fight than you are willing to admit), and they all agree that they are MUCH better off than they were under either Saddam or the Taliban...which is obvious on its face. So your arguements, IMHO, fail across the board.
In fact, one of the only things that can reverse the good that has been done, and paid for in blood, would be for us to not finish the job. Under Obama, that is a distinct possiblity.
Under obama, it is a distinct PROBABILITY. He is reversing ALL of the good that has been done in Afghanistan AND Iraq. By design. Iran is emboldened by this and will take every opportunity to do as much damage as it can and there will be nothing we can do about it. Not because we can’t. Because we WON’T.