Ken Ham, the head of the Creationist group Answers In Genesis and founder of the Creation Museum, joined conservative radio host Janet Mefferd last week to discuss a new book about evangelicals who have embraced the theory of evolution. These Christians, Ham said, are following a “pagan religion” and are therefore inviting the judgment of God.

Ham said he wasn’t questioning the salvation of people like pastor Tim Keller who are open to a coexistence between the science of evolution and the Christian faith, but that it’s an “authority issue.”

“It really is an authority issue,” he said. “And once you start questioning the first part of the Bible, and I’ll guarantee that people like Tim Keller and others, when it comes down to it, the bottom line is they believe in millions of years.”

“I’m going to say it out very bluntly,” he said. “Look, millions of years in evolution is the pagan religion of this age to explain, to attempt to explain life without God. And when you compromise God’s word with millions of years and evolutionary ideas, you’re no different to the Israelites, who took the pagan religion of the age—or the Canaanites, or whatever—incorporated into their thinking. And look what happened. It destroyed them, and God judged them before it. We are no different, there’s nothing new under the sun.”