Hadi Matar also told the Post he had only "read a couple pages" of Rushdie's novel "The Satanic Verses" and that a tweet in the winter announcing the author's visit to the Chautauqua Institution gave him the idea of going there.
Rushdie, 75, was set to deliver a lecture on artistic freedom at the western New York venue when police say 24-year-old Matar rushed the stage and stabbed the Indian-born writer on Friday last week.
Rushdie has lived with a bounty on his head since "The Satanic Verses" published in 1988 prompted Khomeini to issue a fatwa urging Muslims to kill him.
"I respect the Ayatollah. I think he's a great person. That's as far as I will say about that," the Post cited Matar as saying in a video interview from the Chautauqua County Jail.
"I don't like him very much," Matar said of Rushdie.
"He's someone who attacked Islam, he attacked their beliefs, the belief systems," he told the Post, adding that he had watched YouTube videos of Rushdie.
Matar denied being in contact with Iran's Revolutionary Guard, the Post reported.
Matar, of Fairview, New Jersey, pleaded not guilty to charges of attempted murder and assault at a court appearance on Saturday, Barone has told Reuters.
Matar also told the Post he had taken a bus to Buffalo the day before the attack and then took a Lyft ride to Chautauqua.
"I was hanging around pretty much. Not doing anything in particular, just walking around," he told the Post, adding that he had slept on the grass on Thursday night.
"I was just outside the whole time," the paper quoted him as saying.
(Reporting by Chris Gallagher in Washington, editing by Deepa Babington)