I'm sure this is true for some, but one of the guys I referred to in my earlier post actually tags ALL of his instagram posts with a tag that is similar to "#soldier who saw war". (I will refrain from giving the exact tag.) On top of that he frequently posts throwback pics and in a recent pic he captioned it with something like "heading to Iraq to protect YOUR freedom!!!" (The quote is a paraphrase, but the number of exclamation points was accurate.
First things first, after reading this thread it's clear SF1900 is an Obama supporter who would vote for him if he ran for a third term.
I respect all who serve in the armed forces but there are a select few, like the ones you're referencing AD, who are obviously social outcasts with self esteem and identity issues, no different than Big Lenny from the Jason Genova YouTube clips.
I'd be very impressed if this guy signed up with the intention of protecting the freedom of his Instagram friends. I could imagine the same man watching American Sniper and commenting on how the movie wasn't real enough and his crew was one the few who didn't have snipers looking over their shoulders.
If you're not going to challenge his nonsense (and I'm sure it's not worth it) it's best to ignore him and bring up his dumb posts when in the company of his other online "friends". I'm sure everyone has similar feelings.