Kim Fabricius, my favourite God-bothering-blogger, has a quote from Kierkegaard on the state. I wanted to highlight this as a way of saying that Nietzsche, Marx and other atheists were hardly the first to realise that Christianity has been used for less than noble purposes.
It seems odd that many critics of Christianity liberally quote from atheist critics of religion such as Marx, yet never find room to quote its Christian critics. If they did their arguments would carry more weight. I suspect that they choose not to because they are pushing an agenda much more radical than a fair critique of Christianity, and are not being completely honest about it.