As someone who live in WA State, we only technically still hang people. First of all, people have had the choice of lethal injection or hanging. We've only had 5 executions since 1994, only two of whom were hung. Every case of capital punishment since 1941 has been for murder. Only one person formally slain by the Washington State Department of Corrections has been hanged for anything other than murder.
It doesn't cost 20 times more to keep people on death row, but it does cost more in general for capital cases. A great deal of the extra cost is actually in the court case (defense/prosecution costs) - and that's without accounting for the costs of other court officials. The cost increase is due to there being more at stake, and therefore requiring on average much longer cases than non-capital ones.
"Only 3/4 people we gore only die because the victim was white" - um, what? The data I find ("Victim Gender and the Death Penalty") does have some data that does seem to back your point if more thought isn't put behind it. That data being that 70% of the criminals that got the Death penalty had white victims. However, you fail to understand the context of that number. Is that because people 'care more' if the victim was white, or just because more of the crimes in the study were against white people? In that same study, 90 (63.2%) of the murder cases they looked at were against white people, while 53 (36.8%) cases had non-white victims. 70% of the executions were for murderers who killed white people, but 63% of the murders were against white people.
If you aren't getting this, what I'm saying is that most of the people killed by murderers in that study were white, therefore most of the executions found by the study were for killers of white people. That's not racial bias, that's actually equality at work. The study can be found here: http://scholarship.law.cornell.edu/cgi/viewcontent.cgi?article=2425&context=facpub
The information I cited is on page 23.
Gonna skip the bits on Singapore and North Korea because I kinda don't care. I think those laws are silly, but I don't have much else to say about that.
China has a history of selling the bodies of the executed, which I assume is what you're talking about there. I do know that they have sold the bodies of political prisoners to things like Body Worlds and I'm sure a bunch of other odd places. Not much to comment about Rome or Ancient Egypt. Romans had a whole bunch of ways to kill people, you could really write a whole book about it and I have little interest in doing that.
1/25 people are innocent? I don't know where you found that fact, and I doubt there's any truth to it.
And since this is a review on Newgrounds and not just my Youtube comment that I copy/pasted - the animation is passable. I'm not too fond of it personally, but it's alright. The singing is terrible, and some of that is because there's no music behind it. I think that really would have helped. Also, the singing is pretty awful. Particularly, on any extended bits like the 'Yeaaaah' at the ~45 second mark make me cringe. I don't know if that's intentional, but my god is it jarring. Overall, it's not the worst thing on Newgrounds, but it's pretty far from the best. I think the only reason it's rated so highly is that Newgrounds is populated by mostly young people who tend to lean pretty hard to the left, politically speaking, and this appeals to that political alignment.