As it has by now become clear, words like “political theology”, “political religion”, and “secular religion” are all problematic in one way or another. (And I could name a few more.) The whole conceptual chaos surrounding such terms is no accident, however. It all follows from the authors’ inability to define religion, and thereby their similar inability to say what secular is. This is why almost everyone relies on their own favorite formula, and then go into long and complicated explanations on how something that’s religious is at the same time secular, and vice versa.
There are nevertheless two advantages of this mishmash. The first is that it calls attention to the irreparable vagueness of the concept of religion. (With which I will deal later.) The second is that it teaches something important about modern ideologies. Namely, that there is always some absolute at the heart of all ideologies. I would not call it “religious”, of course. “Religious”, as I said many times, obfuscates more than it clarifies. But I would be happy to see ideologues embarrassed by their own inability to tell the difference between “religious” and “secular” absolutes.