A man with prejudiced views against religion

One word substitute is Profane.

Orthodox: following or conforming to the traditional or generally accepted rules or beliefs of a religion, philosophy, or practice.
Bigot: a person who is intolerant towards those holding different opinions.
Fanatic: a person filled with excessive and single-minded zeal, especially for an extreme religious or political cause.
Profane: (of a person or their behaviour) not respectful of religious practice; irreverent.