You have an unfounded persecution complex about this.
The reason it appears to be the case is because there is a vocal Christian majority here.
When raybia has created threads about Islam, we were all right there to challenge it. However, there was a lack of informative challenge, because everyone knows Biblical scripture, but few knew much about the Quran.
When Scientology is in the news, people are WAY more ruthless and unanimous in their derision and condemnation of it.
Also, there are more belief systems than just "religion".
If you believe that the moon landing was a hoax, or that 9/11 was an inside job perpetrated by a global conspiracy, believe me, you are treated like less-than-a-turd, mocked, ridiculed and gratuitously talked down to, if not simply strenuously challenged.