I have suggested that Fundamentalism is demonic. …Tillich (one of the theological triumvirate of the twentieth century) makes the same allegation on the first page of his magnum opus … Fundamentalists “confuse eternal truth with a temporal expression of the truth. … the theological truth of yesterday is defended as an unchangeable message against the theological truth of today and tomorrow. … It elevates something finite and transitory to infinite and eternal validity. In this respect fundamentalism has demonic traits. It destroys the humble honesty of the search for truth, it splits the conscience of its thoughtful adherents, and it makes them fanatical, because they are forced to suppress elements of truth of which they are dimly aware.”…[Tillich] uses the word demonic to indicate something which is opposed to the truth, which subverts the truth and presents an obstacle to those who are searching for the truth.

– Peter Cameron “Fundamentalism and Freedom” p. 81