Can someone explain the modern American usage of the word "ideology" to me? Because in my books, an ideology is something that promises to hold the key to all s

Can someone explain the modern American usage of the word "ideology" to me? Because in my books, an ideology is something that promises to hold the key to all secrets and all future wonders, the explanation for all evils (which is usually failure to comply to the ideology). E.g. there is even a difference between just being racist on an individual level -- as sucky as that may be -- and explaining the whole world and who is to blame for evil in those terms, the latter being ideology, like white supremacism. Or say, Bitcoin. It can be just technology, but people can also turn cryptocurrencies into an ideology. Same with "AI" and so on. That's how I understand ideology, to me it implies a narrow and distorting lens through which to squeeze all problems. But the way I see it used, it seems to be more like something that makes some kind of moral judgement, or has an opinion on a few issues that are framed as "left" or "right" in the US public. I honestly don't know and just can't parse that word the way it's often used.