I mean sure Madara did many evil things, but his intention was good. He was manipulation by Black Zetsu, just like how Madara manipulated Obito. Madara could have been saved if they put the Gedo Mazo into Madara, which should have been more seeing that his body was strong enough to handle Sage Mode + being the jinchuuriki of the Juubi.
Sasuke did evil things, yet he doesn't want anyone to kill him.
Sasuke did evil things, yet he doesn't want anyone to kill him.