This is actually a bit of a tell, because the best way to make ideology palatable is to make it seem like common sense (which is easy if that ideology is already in power). As zizek said, it is when you believe you have stepped outside ideology that you are most fully ensnared by it.
A lot of people think, "I am not ideological, I just use common sense, I am apolitical." Sorry but this is a game you must play whether you want to or not- trying to avoid making a choice is still making a choice.
Its like with fashion, for example- you may think that by wearing khaki shorts and sandals with socks that you are avoiding making fashion choices, but what is actually happening is that you are simply making very bad fashion choices.
I rather think that one of the psychological principles beneath authoritarianism is that making choices requires effort, and so people try to avoid it, and the easiest way to do that is by copying whatever everyone else is doing. When a person in this mode sees other people doing things that are different or unusual or out of place, they are reminded that in fact they have free will, and that other choices were always possible, and that is a disturbing and uncomfortable thought.