Morality

One bit of political argument often used by the left or libertarians that I don't really agree with is the notion that we can't or shouldn't legislate morality.
I feel that a significant reason to have government is for the regulation is of morality.
Even our most basic laws such as not killing people are regulations of morality.

However, I think I understand what people mean when they say we should not regulate Morality. They are probably trying to say that some issues are strictly moral in nature and have no other practical value. While murder may be a moral issue, it is also a practical issue. It is difficult to have a well functioning society if people can kill whoever they want.

Nonetheless, I think a great deal of our is about issues which are almost entirely moral and have little practical value to the state. Things like the civil liberties act or the American with Disabilities Act etc. are essentially moral moral issues. I imagine all but the most hard lined libertarians are okay with these legislation on morality.