Interesting. I never thought of that.
From Ira Levin's obituary in The New York Times:
"Mr. Levin was less pleased, however, at the tide of popular Satanism his work appeared to unleash.
“I feel guilty that ‘Rosemary’s Baby’ led to ‘The Exorcist,’ ‘The Omen,’” he told The Los Angeles Times in 2002. “A whole generation has been exposed, has more belief in Satan. I don’t believe in Satan. And I feel that the strong fundamentalism we have would not be as strong if there hadn’t been so many of these books.”
"Mr. Levin was less pleased, however, at the tide of popular Satanism his work appeared to unleash.
“I feel guilty that ‘Rosemary’s Baby’ led to ‘The Exorcist,’ ‘The Omen,’” he told The Los Angeles Times in 2002. “A whole generation has been exposed, has more belief in Satan. I don’t believe in Satan. And I feel that the strong fundamentalism we have would not be as strong if there hadn’t been so many of these books.”