Simon - Some are misguided but it doesn't take away their courage and bravery and they don't deserve to be erased from history.
What about those that chose not to go to war and were jailed? It could be viewed by some that this took more courage, they had to face ridicule and humiliation by their fellow countrymen, they are not celebrated or honoured.
Their courage and bravery was different, they were breaking the law and going against the generally accepted norm. Because they were in the minority their bravery is not acknowledged. The Vietnam War was possibly the most significant time when more individuals started to question this dilemma but I don't recall any monuments erected in their honour. There are songs, movies and artworks but no monuments, maybe this is one way that acceptance of alternative stances slowly creeps into society on a larger scale.
By acknowledging one group of people we diminish the accomplishments of another group of people, usually those in minorities but they are often there and it's good to examine these by looking back in history.