He certainly is a jackass.
And he is wrong on a number of points on his history.
1) Monty was not out to 'win the war' by himself.
2) The Germans were certainly not 'falling back'.
3) There were enough britsh paratroopers.
4) The British paratroopers did secure the bridge at Arnheim if the assault had remained on schedule.
5) The entire assault did move too slowly due to a ferocious Germand defense - particularly since they were required to attack down a single road with boggy ground on both ends.
6) Recon had failed to notice (or decided to ignore) the arrival of a German panzer group that was put there for R&R.
7) The almost total loss of the paratroops was not great. However, the attack was not a fiasco in and of itself. A lot of ground was taken.
8) As the movie says - it was a 'Bridge to Far'. A less ambitious advance would have been a total victory - but would have given up the chance for a total breakout.
9) When you are up against a determined and vicious enemy - you are going to take casualties. Often the daring assault, the blitzkreig, achieves a great victory for far fewer losses than anyone could dare imagine. Witness the German blitzes at the start of the war.
I fully agree with your rendition of the facts. Mr. Greeley should stick to writing fiction. In his world, leftist leaders are never driven by personal and base motives, but only by high principles and the greater good of mankind. That certainly describes Bill Clinton, John Kerry, Ted Kennedy, ...NOT!