Kurt Wise had always been a fundamentalist and creationist. He just happens to be (or to have been) one of the very few honest ones. He admitted that the evidence for evolution is overwhelming, but accepting it would conflict with his beliefs (he had taken a bible and cut out of it everything that he believed he would have to abandon by accepting evolution and, I think, an ancient earth, and was left with tatters), so he made the conscious decision to go with his beliefs instead.
There was an interview with him on AiG.
PS
I still think it was most likely Kenyon. But, as everybody has pointed out, given the nature of creationist quote-mining, it could be anybody.
Edited by dwise1, : PS