It is not justification but common sense, given that it's a freaking battle-field and all present Ninjas are a part of elaborate Military Setups. None of them are civilians. To call killings over a battle-field where two opposing sides are fighting Mass-Slaughter just because Lady Luck is smiling down on Madara and favours him the battle is pointless.
I don't understand why Madara's being justified through the pointing of fingers at the Shinobi Aliiance saying, "They asked for it," as if by some twisted logic that makes killing okay and the right thing to do.
I can equate this to the situation Sasuke was exposed to when he fought 1,000 men. They were absolutely nothing to him, and he put them all down without a single killing blow. What of Madara? He didn't show such feelings. He just killed them like they were trash.
Wether they would've done the same to him or not changes nothing about the topic at hand, that being wether Madara is evil or not.
That's not the topic at hand though, is it? The OP is saying that Madara isn't evil. Do you agree with that shelke? I know full well the idiocy of the Shinobi system and all the horrid things they did, and I view a lot of them in similar light as Madara, but I still think Madara's evil.
I don't feel the need to justify crime with crime.
And as puts SasoriOfTheRedSaand it:
Same story for this.
I find it hilarious how no one on this forum as ever declared any Kage evil, when their entire sordid existences hinge on this term. Madara is honest about his ideals.
But does this make Madara any less evil? I don't condone Kage's and support their actions, but I'm not going to gloss over Madara's crimes because of it.