Well, in Canada, we have Hate Speech Laws, wherein it is a federal crime to target individuals or groups by promoting violence against them. That IS a limitation of "freedom of speech" but since I don't feel a need to call for violence against others that limitation on my "free speech" doesn't curb my personal speech in any way. In all fairness, I have a harder time with the RF rulebook and occasionally cause consternation in the Moderator's Bullpen. RF's rules curb my dialogue far more than my own government does.
In regards to religious matters, I feel that anything that is not against the existing laws of your country is fair game. Though that awful movie over Christmas, a comedy about assassinating Kim Il-un, is about as low brow as it gets. Could you imagine the outrage if you replace Un with Obama? People would be in jail.