Is freedom of religion necessary?

If standard human rights documents include freedom of expression, peaceable assembly, and the non-interference in the market of ideas and opinions, why do religions always get a whole other right to themselves?

I've always thought of this as a case of simple redundancy, but in the right (or wrong) hands it can be a lot more than that. Spun the right way, it means freedom of expression in the religious sense is protected more than in any other sense. Instead of my freedom of expression vs yours, it's my freedom of expression versus your freedom of religion and expression, and that of your organization.

Uncool.