That's not really it. It's more along the lines of "two wrongs don't make a right". We want a government that represents society's morals - that doesn't act immorally in the name of the "good" of society. To put it another way, we don't want government to do anything we wouldn't feel justified in doing personally if it came to that.
The good of society is the primary goal of the Constitution. Morality is entirely subjective and should not even be a factor. Doing unto others is a wonderful sentiment, but I have seen so many things people are willing to do to others that I don't trust the concept much.
What holds us together is the law. Written down for all to see, interpreted and enforced in the light.
Of course. I'm saying nothing different. Except that we shouldn't endorse anything in the name of the law that we wouldn't feel justified doing personally. In other words, if I see someone attacking an old woman to steal her purse, or worse, I'd feel justified - even obligated - to use force if necessary to prevent it. And I'd want the law to do the same. But, even if I might feel personally obligated to help the poor, or the refugees in Iraq, or any other number of noble causes, I wouldn't feel justified in forcing my neighbors to join me. Likewise I don't think it's right for the law to do it on my behalf just because we had a vote.
And I do think it is not only right but necessary. Living in a country where abject poverty, starvation and disease are not rife is not free. If one wishes to live in such a country they should expect to have to help pay for it. But I am not naïve enough to think that most people will do this voluntarily. Some will, but it is not fair to expect them to carry the burden while others get a free ride. So I have absolutely no qualms about forcing my neighbor to join me whether they want to or not. Just as I have no qualms about forcing them to help pay for the military, fire services and sewer systems. It is the choice we make to live here. No one is forced to make that choice.
I don't buy "love it or leave it". Forcing one's will on another is "original sin" in my view. I don't expect other people to follow my orders, nor yours, regardless of whether those orders are supported by a majority. I appreciate that you don't see it this way, but this is the key to understanding libertarianism. It's essentially a qualified pacifism. We'll fight to defend ourselves, but not to bully others for the sake of convenience.
And I do understand, it is just in error. If you walk into a store and intend to walk out with something you can expect to be required to pay for it. It is not optional. The same holds true for society. Paying for the benefits of society is not an option you can decide to forgo. It isn't an issue of "love it or leave it". It is a matter of paying for what you take.
I'm not sure what post your responding to, or what you consider to be "in error". I was describing libertarian values. Are you saying my description is wrong? We're opposed to the initiation of violence. How is that "in error"?