James Dean was essentially raised a Quaker. Some evidence points to a deep questioning of religious fundamentals, perhaps he was an atheist but perhaps he never had enough time in life to really question his own beliefs.
Dean didn't get into politics, but is widely considered the face of American rebellion.
James Dean was born in Marion, Indiana. He lived in Santa Monica, California briefly until his mother died, at which point his father sent him to live with relatives in Fairmount, Indiana. Dean died in a car accident just outside of Bakersfield, California in 1955.
But there is a strong push by some Christians to paint Dean as an atheist, or maybe an occultist, and quoting him as saying things like:
No matter what they say, there isn't any heaven. There's no hell either.
I believe in freedom, not God.
But these quotes are unattributed–and rare even in the near-infinite internet universe. Plus, books have been written debunking such rumors, so I'm skeptical of their validity. However, one quote attributed to Dean's does hint at the possibility that Dean was unsure about the existence of an afterlife. He said:
If a man can bridge the gap between life and death, if he can live on after he's dead, then maybe he was a great man.
To me, this shows that Dean believed in a sort of "pagan immortality." But as far as the Satanist, occultist, atheist rumors, I remain unconvinced.
Not much time for politics
Dead by 25, Dean never got too involved in the political discussion of his time. But the political discussion certainly got involved with him.
Dean came to be an icon for the "beatniks" of his day and the hippies of the next generation, those significant minorities in American society who wanted to reject the values of their parents, lost faith in the "American Dream," and started questioning the supposed benevolent values of America and her place in the world. Perhaps Dean summed it up best when he said:
My purpose in life does not include a hankering to charm society.
He gave purpose to those who felt they didn't fit into society, and even today Dean is an icon for social outcasts and dissidents.