"Frankly, I don't remember who your government declared an enemy at the time, and don't feel it matters terribly to the debate"
How can what the clearly stated objectives of the invasion not matter to any discussion about why we are still there?
When you're walking around doing your shopping and ask "what am I here for?" how can the shopping list you made when you left home not matter?
"Btw if you are not going to answer anything I say, I think I will take my leave from this thread."
Once we've agreed the facts of the matter, that the Taliban were one of the original enemies and that their destruction was one of the objects of the invasion, then I'm happy to take the discussion on from there. While you just ignore a fact of history and see it as being unimportant it's really hard to have any discussion about that consequences of that piece of history.
Whether they should have been an enemy is a very good question.
Whether we should change our goals is a very good question.
Why we haven't met our goals after so many years is a very good question.
Ignoring why we went to Afghanistan when asking why we are still there makes for a very bad question.