Philip Pullman gets it exactly right on religion:
Religion, uncontaminated by power, can be the source of a great deal of private solace, artistic inspiration, and moral wisdom. But when it gets its hands on the levers of political or social authority, it goes rotten very quickly indeed. The rank stench of oppression wafts from every authoritarian church, chapel, temple, mosque, or synagogue – from every place of worship where the priests have the power to meddle in the social and intellectual lives of their flocks, from every presidential palace or prime ministerial office where civil leaders have to pander to religious ones…
My basic objection to religion is not that it isn’t true; I like plenty of things that aren’t true. It’s that religion grants its adherents malign, intoxicating and morally corrosive sensations. Destroying intellectual freedom is always evil, but only religion makes doing evil feel quite so good.
And that’s why religion should always just be a private matter for individuals and not something with political power behind it. And anyone who disagrees is an enemy of the human species and should be treated as such — particularly in times such as now when religious extremists may well precipitate warfare that ends the world.