At the invitation of the Friedrich Naumann Foundation, which is associated with the German Free Democratic Party*, I wrote a piece on the laws concerning criticism of religion in the USA. Short version: there pretty much are no enforcable laws against criticizing religion in the US. The longer version is in the book, in German. I tried to keep it relatively non-technical.
There are also entries from many other writers on freedom of opinion concerning religion in other legal orders, including Russia, France, and the Islamic world. I haven't had a chance to read the other articles yet, but they look interesting.