Again, that is very pessimistic, Bloodshadow. And I believe incorrect. The vast majority of the population consists of people just doing their thing, not hurting anyone for no reason. Society is more individualistic now. But... we all enjoy the protection of the police, we have education, clean water etc. Things we paid for together. You may say that is not ''goodness.'' I say it is the same process, just a bit less strong. Regardless we were all taught to help society. What you get back for it may not be tangible, but we are so used to it we do it anyway.
It does not matter if you're an atheist or a Christian. The atheist might say: Help another man, and you may help society.
The Christian may say: Do good onto others, but do not take pride in your good deeds. A good deed for the sake of the good deed is what Jesus taught! While I'm an (agnostic) atheist you can see this makes a lot of sense. There are no good deeds of the type ''Haha, look how good I am and look how much money I have got.'' That is not a good deed at all and it goes against the teachings of Christianity. So, a good deed is not for faith. It is for the person you do good to. I have to agree with you, a Christian not understanding this did not read very well.
Now, allow me to take another trip... You say you remember all the times people insulted you. What a burden this must be. Forgive, and let it be, is the Christian way. Not Christian? Well, your attitude is not very Zen either. Insults? They are only words that slide off like water from the back of a duck. Why use your energy on this resentment? Your own negativity will only bring yourself down. Release yourself. Be positive, start with a clean slate, and you are free. It is not as bad as it seems. Talk to those people again some time, but with a positive and constructive attitude.
I am really shocked you say no one would help you if you got mugged. That is, even assuming the power balance is in favour of the helper. That is just nonsense. Come on man... If two kids were fighting and it got out of hand, what do you do? Right, you pick one up.
It takes a lot of courage to step up when the odds are bad. People may be watching, but they might be in shock as well. In today's society we do not live in the same packs. A group of strangers has no natural leader, which makes it a bit hard to know what to do. ''Hey, if I help, do those others have my back?'' You don't know that. In the confusion a mugger can rob you easily. You need to remember how intimidating it is exactly to be exposed to violence. I've seen it a couple of times, usually bar fights but sometimes in the streets during daylight. If you see that for the first time without any training, you..are petrified. Just petrified. It helps to shout loudly at the offenders to mobilize the crowd. I have not done that often, only after I had been drinking myself.