No, everyone should have an equal chance, but not if they are going to spout off about their religion, or its laws, during the review and rate the game accordingly. The same thing goes for philosophical beliefs, so, for example, a Taoist should keep the teachings of the Tao De Ching out of his, or her, review.
I defy you to justify why someone on a religious website should avoid the topic of religion in their opinions.
Again, that site isn't linked for its reviews. Despite what you believe. They have a whole other section for review sites, that's not it. But, that's all pointless because THEY'RE NOT ENDORSING THE SITE.
Cut to the chase, what's the big thing that's offending you here?
1) That a religious guy on a religious website cites his religion in his opinions?
2) That ESRB is endorsing this site? (They're not)
3) That the ESRB is endorsing his reviews? (They're not, the site isn't even listed under sites that offer reviews)
4) That the ESRB acknowledges religious people exist and links a website that may be relevant to their interests.
5) That the ESRB links to a website that attempts to help parents understand media, the effect it has, and how to handle this in concert with the desired values they have for their children, even though the values of the writer are in contrast with your own and they don't endorse the website.
Sum it up in one sentence.