I agree and don't intend my statement to sound as if I know exactly how everything transpired. However, there is a good chance they were poor low class citizens and/or illiterate whether they are from Afghanistan or another Islamic country. This is how some these young middle eastern men are taken advantage of when they are recruited by Al Queda and other terrorist organizations. So, I was basing my assumptions on that fact which certainly doesn't have to be the case (as you pointed out). The rich sheiks recruit poor lower class men who essentially have no future and these terrorist "commanders" are commonly educated.
I have to think it is harder to shoot down a chopper full of seals than it is to take down a chopper full of national guard troops. Maybe this is because I have no familiarity with military operations, but it just seems illogical to me that these seals were shot down right after the portions of their group took out Bin Laden by veterans of the Soviet incursion into Afghanistan (aren't most of them dead by now?). It could certainly be coincidence and good independent intel by the Taliban, but I am wondering if there was some help from the Afghan army, government, or Pakistani intelligence (which wouldn't surprise anyone at this point).
P.S. has anyone read Steve Coll's "Ghost Wars"? It is a fascinating historical narrative of CIA involvement in Afghanistan from our initial involvement in the Soviet area to the present day. However, I'm afraid there is nothing paranormal about it.
The concept of shooting down a transport helicopter with what is basicly a a point and shoot weapon is very basic. Average Afghani dirt farmer could accomplish it with a little luck. Enemy knew that someone was coming to rescue the previous troops in contact, so it was merely a waiting game for the backup troops. 99% surety that the shooters had no idea who was in the helicopter thye were shooting at, only that it was US forces of a high degree (depending on terrain, conventioanl forces would have just convoyed in). As to help from Afghan or Pak gov't: entirely possible - corruptioon in both organizations run rampant.