Perhaps because the Earth Alliance was to blame for the whole thing in the first instance? Putting a historically bad commander in a first contact situation with a vastly superior alien race (despite warnings from others)...
And perhaps because the Minbari stopped short of Genocide in the end.
History is written by the victors, but I doubt even Clark's regime could put a positive spin and call the E-M war a victory and start rewriting history; not only did the Minbari not start the war, they finished it, as Captain Sheridan's dad would say.
All in all though it comes back to judging an alien race along the lines of Human morality. To the Minbari the war was completely justified at the time.
And perhaps because the Minbari stopped short of Genocide in the end.
History is written by the victors, but I doubt even Clark's regime could put a positive spin and call the E-M war a victory and start rewriting history; not only did the Minbari not start the war, they finished it, as Captain Sheridan's dad would say.
All in all though it comes back to judging an alien race along the lines of Human morality. To the Minbari the war was completely justified at the time.