Social Stigma (and other beliefs/ideas), Survival, and Explanations

First, for those of you who don't know it:
Social Stigma (from Wikipedia): "Social stigma is the severe disapproval of, or discontent with, a person on the grounds of characteristics that distinguish them from other members of a society."

This is the point of this post: Social Stigma exist and are not good for modern society. In ancient society, they helped us survive. But today, they are simply things that drag people down and punish those who don't conform to certain rule sets.

These are my ideas on the roots of specific stigmas. Keep in mind that these are not scientifically based - they are ideas based upon my knowledge of humanity and its history. In addition to that, this is not a complete list, not by far. These are just some more obvious ones with more real world importance.

* Stigma against murder: This is a no-brainer. Homicide is not a survival skill.
* Stigma against suicide: Same as murder. Dead people can't have sex and can't reproduce. Unless you reproduce via spores which are released upon death.
* Stigma against homosexuality: Because it doesn't help the group increase its numbers. There's a number of other reasons, political, religious, and so-forth, but I suspect that a large portion of this stems from that idea.
* Stigma against transgenderism or whatever it's called: Humans who attempt to mimic people of the opposite gender will have trouble reproducing if they don't attract the same gender they are mimicking. And if it involves cutting off/out genitalia, then it seriously limits reproductive ability.
* Stigma against transvestism: Same as transgenderism.
* Stigma against people the disabled (mentally or physically): If it's an inherited trait, it's bad for the gene pool.
* Stigma against secular individuals and people from other religions: Religion is a unifying trait, and in general helps the group survive.
* Stigma against other so-called "races": Same as against other religions - unity is good for survival.

I could go on.

The first two things here I have no problem with. Few people would enjoy living in a modern society where murder was allowed, or at its extreme, commonplace. As for suicide, there are usually solutions.

The rest of this group I believe are very flawed, outdated, and unnecessary.

First, sexuality in all of its forms (other than heterosexuality): While in the past, being something other than heterosexual was bad for reproduction, today it really doesn't matter. People who are inherently something other than the norm (sexually) are what they are, and they don't need to be "fixed".

Next, disabilities: I'm certain these stigma still exist, although I rarely see them. They are pointless and if someone is born with a disability, you can't blame them for it. If they acquired it, most of the time, it was not their because they're stupid or deserved it. Most of the time.

Religion/Secularism/Race: Definitely a hot topic today. It used to be that you could be killed openly and legally for this sort of thing in the United States and much of the civilized world. Nowadays, it's not so common, but these stigmas still exist. Religion, as I will talk about in another post, is no longer necessary. In fact, it never truly was. Secularism is not the opposite of religion or a division of religion, but there is an ingrained belief that you have to have a "purpose in life" - take it from me, your purpose does not have to be religion. It can be whatever you want it to be. As for race, it no longer is as pressing an issue as it used to be, at least in the United States and Europe, but there are still many problems. In another post I'll talk about how racial issues could be resolved.