Justifying V

I was disappointed that we never reached a conclusion on why Susan's logic for wielding absolute control being because it was necessary was different from V's logic for wielding absolute control being because it was necessary.
I acknowledge that it was noble of V to take more direct responsibility for his dirty work, but it was dirty work nonetheless. We skirted around the issue that perhaps the only important distinctions were the intentions of each character. Is killing justified if the killer has a greater good in mind? The same idea appears (like we discussed) with Mike from The Moon is a Harsh Mistress explaining his crashing of a ship because it seemed necessary for the cause, which is why I found it so odd that V never tries to explain or justify his actions to anyone. It makes V seem that much more inhuman, that a computer showed more typical human behavior than he did. V's character is all the more dangerous simply because he seeks no recourse or justification from anyone, even Evey who practically begs V to clue her in. If we justify V's actions as being better than Susan's because V has a more noble end in mind, aren't we justifying any individual taking our future into their hands simply because they think they know what's best for us? Or that they won't force anything upon us, just make it nearly impossible for us to choose any future but they one they approve of?
On some other points, I appreciated the historical comparisons that we discussed, particularly the similarity to the Nuremberg Trials. It harshly illuminated the scary fact that there really are people who pass judgment on who is guilty to what degree- and who should die. And apparently these characters don't just show up in graphic novels.
As for comparisons to the movie- of course I agree that they are ridiculously different, but that doesn't make me like the movie any less. It might just be that I enjoy the more romanticized version of a revolutionary in comparison to the cold anarchist V Alan Moore created. It might be that "strength through unity" seemed to provide a more practical founding statement for a lemming population than "strength through purity," though not as close to the fascist doctrine. Whatever the case, I enjoyed both on different planes but was glad we discussed the major disparities.