Political ideology and religious doctrine are distinct, yet confusion can justifiably exist because ideology can seep into doctrine or be claimed to be such when it is not. This interlarding of political ideology into religious doctrine, or theology, is perhaps best demonstrated in Christian liberation theology, which includes political (e.g., justice) and economic (e.g., equality of income or wealth) prescriptions in the future Kingdom of God manifest on Earth. Generally speaking, political (and economic) ideology can legitimately be viewed as being human, all too human, and thus as fundamentally distinct from religious revelation and even doctrine (though even these may be influenced and even distorted on our end by the taint of human nature). Put another way, the source of revelation and even doctrine comes from “above,” whereas political (and economic) ideology are human artifacts. Therefore to infuse such artifacts into religious doctrine risks polluting it such that the religious or spiritual auspices are impaired. David Hume suggests in his Natural History of Religion that the human mind cannot long hold onto the divine idea manifesting purely as simplicity, so we attach other ideas—anthropomorphic ones—to our conceptions of the divine. Such ideas are of human traits or characteristics, hence “from below.” Sadly, we rarely recognize this human activity; rather, we take God to have such characteristics. The criticism of Pope Francis by “ultraconservative” American Catholics, including some notable clergy, illustrates just how problematic the admixture of political ideology and religious doctrine can be.
The full essay is at "Political Ideology and Religious Doctrine."