The Way We Treat Others: Why do people treat others poorly? Simple, not everybody was created equal. People deserve some of the same basic rights, but in the end everybody is unequal and it is human nature to point that out. I am taller than you, therefore I make a shortness comment, you are Asian and I make a comment about that, in the end I still respect you as a human being. There are two problems, one are the actual jerks, who will actually pick on someone just for the sake of it, and the other problem are over-sensitive people. Somebody shoves you so you confront him? How is that common sense? The person was not picking on you, which makes confrontation an extreme reaction. People just need to stop thinking that the other person is picking on them, and start thinking that maybe they are just goofing around. I would say that less than one percent of kids are actually bullies. Recently it seems that everybody thinks that they are being bullied and oppressed, which is simply not the case.
Parents: This really comes down to what type of kid you get. I don't blame the parents very often when something goes wrong with a kid, because I know people who have had childhoods which fringe on what you consider ethical, and they are some of the nicest people around. Parents think that everything that they do has an adverse effect on their kids, but in the end as long as you were there to tell them when they did good, and when they did bad, you did your job as a parent.
Censorship: Censorship is a dead tool, nowadays kids have already mastered the ultimate repertoire of bad words by about age ten. Also I've never seen a single instance where a person actually acts in a violent way because of violent shows and games.
Language: We have bad words so that we can convey emotions, I don't know exactly who, when, or where the list of censored words was created but it seems to work. As for your argument regarding two synonyms try that with a black person, see their reaction.
Nudity: I am actually having a difficult time coming up with a response to this, but I'll be sure to come back and post it when it comes to me.
Religion: I am an avid foe of organized Religion. Having an old guy tell you about what he thinks about a book that has been translated a couple of times about stuff that has supposedly happened thousands of years ago, does not strike me as a form of enlightenment. The more people cling to their religion, the more it shows that they do not want to look for the answers themselves. The Bible is supposedly telling us right from wrong, but all it really is, is just a pile of stories that humans can relate to, which tell us how to behave. Honestly the Bible and Santa are the same thing for different age groups, "Be good or you won't get your presents/get into heaven"
Common Sense: Common sense is a persons ability to distinguish between good and bad. All you have done is point out places where logic is unable to explain why something is bad, which is only half of the battle. Now can you logically explain why something is good?