Watch him speak, he mentions natural causes in a slow manner first, then more quickly mentions the scientists. My read is more emphasis on natural causes, and certianly not total acceptance of human influence as a cause, unlike Gore whom you unfairly claimed Rudy was trying to move to the left of on the issue.
I don't have sound on my computer. Post a transcript - you are claiming what he has said here. It shouldn't be too hard to find a passage where he says most warming is from natural causes.