Some examples? Let’s start with something — an opinion or claim — that is not ideology, even though it might seem to be. Here’s one: “Canada is a democratic society that treats its citizens fairly.”
It may be bullshit, but it’s not ideology. The ideology is this: that one barely notices the fact that there are “borders” instituted around “nation states,” and that one of these is “Canada”; that this “Canada” is “a society,” in the singular, rather than multiple societies, or multiple systems and structures some of which cross borders, etc.; that “countries” can be labelled “democratic,” rather than institutions or practices or specific decisions, so that the question of whether it is or isn’t democratic is a sort of total judgment, appealing to some unspoken but supposedly obvious criterion; that many of the people in the supposed “country” are “citizens,” while some are “non-citizens”; that the standard for treating “citizens” “fairly” will differ from the standard for treating “non-citizens” fairly. And so on. Ideology lies here, in this stew of unexamined obviousness. None of it is stated in the claim under consideration (“Canada is a democratic society that treats its citizens fairly”). But all of it is presupposed by that claim.