Name one thing. Your attitude towards Christians and religious people is extremely intolerant.
Why is "tolerance" made into a virtue with you? Both Dibble and I are libertarians, not liberals; we don't feel the need to refrain from stepping on the toes of your precious special interests. I've noticed that the whining of Christian Dominionists has taken on an increasingly cosmopolitan tone in recent years - it stinks of special pleading. There's no reason to be tolerant towards the dominant group in American society.
We ought to treat religions like competitors in a market; what's good for the goose is good for the gander. What we do not need is the State supporting one or the other and thereby monopolizing the marketplace of ideas.
The state isn't supporting any religion by a national day of prayer any more than it is with Thanksgiving or CHRISTmas.
A true Libertarian would RESPECT the rights of religious people, not mock them or treat them like second-class citizens. Liberty includes the liberty to worship the God you want - or not. Many self-proclaimed libertarians simply don't understand that.
No government should have a national day of prayer because it endorses religion in general. Having a secularized government that doesn't endorse any religion/lack of religion is the ideal. Even if the government's practice of setting days of worship is very unimportant, it doesn't change the fact that it is a slap in the face to the non-religious for the government to promote prayer.