The basic assumption of Evolution is tiny changes over time. Are those changes "blind chance", or are they the actions of a loving God? Believers in Evolution can go either way on this.
There appears to be a concerted effort deny that possibility.
The author asserts that evolution is a "religious system of the highest order" - right up there with the other major religions.
Once this is accepted it becomes axiomatic that with respect to other religions it is heresy, and believing in it is apostasy.