Question

Thomas alleges that the state denied him unemployment because he quit rather than work in a location where his religious would be violated, and so claims a violation of the clause.

Answer 1

I believe the answer is Belief; Free-Exercise clause
The first amendment of united states constitution protected the rights of individuals to held any religion under the free-exercise clause.
This protection includes making any establishments unable to create regulations that favor only the people that held certain religious beliefs.