Delineating the Boundaries for Religious Speech in Public Discourse in Kierkegaard and Habermas

How is it that one of the most famous Christian thinkers - Soren Kierkegaard -- and one of the most famous contemporary secular thinkers -- Jurgen Habermas - both agree: the religious has nothing to say in the public realm of social, ethical discourse.

Religious Liberty Laws, Religious Practices, and Discrimination

A set of clarificatory questions I wish to address are: What qualifies as a religious belief? Can corporations have such beliefs? What qualifies a practice as a religious practice? What religious practices are/should be protected by RFRA laws?