Two points here really:
1) Freedom of speech, many people are allowed to say exactly what they want, where they want, and a huge majority offend someone i.e. political parties. pro/anti hunting types etc so why is this poor chap being picked on? Someone complained, simples, the police have to act on a complaint without disclosing the complainant.
2) Religious, as Infomaniac says all sorts of places of worship, put up, what I regard as lies about a mythical being, in an attempt to indoctrinate the population. I have to say this annoys me, but because it is accepted its allowed so this gentleman should be allowed to but his sign up. He of course would lack the resources but he should sue. The dual standards exhibited by society are stunning, in both there archaic banality and stupidly.
The more of us who follow Mr Richards example, the more society will understand that the old superstitions are becoming more and more unacceptable to the majority not the minority.