He should have disqualified the applicant for lack of professionalism. He is now at risk of termination for his own unprofessional conduct. It might appear that I'm singling out Christians in this column. If so, it's because in my personal experience in the workplace I've only experienced evangelism and religious disrespect from ppeople who describe themselves as such. Being the majority in America puts Christians most at risk.
Values are an important part of leadership.
You must therefore discuss values, but when you do, discuss them behaviorally. The best leaders both demonstrate personal integrity in their actions and demand it of their employees, and take steps to ensure the core values of the business are well-understood by all employees. Discussing the source of those values in religious terms, and especially insisting that any one religious perspective is more correct than the rest, puts you in the danger zone. Discussions of religion should take place on personal time and may or may not have anything to do with business. Besides, if you use religion as a criterion for personnel decisions, you won't learn anything.