My take is significantly different, on that. It is too bad he was killed, even by one of his own, and that this was covered up for the longest time, at the highest levels. The whole situation rather speaks for itself. Not pleasant, at all.
Tillman sounds more like modern American unsolved murder, rather than a hero's story. Although significant white-washing has protrayed it differently.
Of course, if you are desperate for heroes, you would grasp at anything.
Certainly no comparison to Leonides at Thermopylae, speaking of heroes. And Thermopylae predates Chaucer, as you know, for those who are easily impressed by a little bit of history.
There are real heroes, and then there are whitewashed ones.