"Ideologues are the intellectual equivalent of fundamentalists, unyielding and rigid. Their self-righteousness and moral claim to social engineering is every bit as deep and dangerous. It might even be worse: ideologues lay claim to rationality itself. So, they try to justify their claims as logical and thoughtful. At least the fundamentalists admit devotion to something they just believe arbitrarily. They are a lot more honest. Furthermore, fundamentalists are bound by a relationship with the transcendent. What this means is that God, the center of their moral universe, remains outside and above complete understanding, according to the fundamentalist’s own creed. Right-wing Jews, Islamic hard-liners, and ultra-conservative Christians must admit, if pushed, that God is essentially mysterious. This concession provides at least some boundary for their claims, as individuals, to righteousness and power (as the genuine fundamentalist at least remains subordinate to Something he cannot claim to totally understand, let alone master). For the ideologue, however, nothing remains outside understanding or mastery."
January 1, 1970
https://en.wikiquote.org/wiki/Ideology