I agree. Kira's logic was twisted. In a lot of ways this show is good because it makes people realize their own capacity for violence; however, I do find it pretty frightening how many people agree with Kira's idea of "a New World".   See 23 other replies

I just don't understand how people can cheer for Light when he was willing to kill his sister and let his father die if only it would secure him victory. It was a complete front, he acted like he wanted world peace but more then anything I think he just wanted to sit on his throne and play God.I liked Light in the beginning but as soon as he started killing innocent people, people who were not criminals, I started to switch sides. But, no one can argue that his 'original' philosophy isn't ideal. It's just not realistic and a psychopath like him never could have carried it out. Loved the series though. Loved it.   See 30 other replies

I was rooting for Light, only because I wanted the series to continue and with the death of Light is the end of the series.
In my mind, I wanted Light to win against Mello & Near (I didn't like them at all), and have another story arch featuring the World of Kira, with an epic ending portraying the world of Kira being toppled by everyone facing their fears of death by Kira, and resolve to take down the tyranny of Kira, to destroy the "artificial peace via fear." The ending sequence would be of Light in absolute desperation taking the Shinigami eye deal and frantically writing the names of everyone who was charging towards him, with hundreds of people dying, but by the end Light is apprehended due to the overwhelming masses of people who realized that "peace via fear" is not true peace, and at that point Ryuk would write Light's name in his Death Note.
Oh well... the actual ending was poetic justice I suppose.   See 30 other replies

http://www.onemanga.com/Death_Note/108/01/
here's the manga interpretation of what happened after kira dies.   See 23 other replies