A woman named
Abbie Richards has proposed this typology of conspiracy theories, from wild-sounding things that turn out to be unquestionably true to things she thinks are detached from reality. She has a plausible topline that all the worst ones are anti-Semitic, although I am going to disagreee with one of her examples there.

Now there is going to be some debate about some of these. Obviously she puts 'The Election Was Stolen' in the "dangerous to yourself and others" category, which indeed it may be -- dangerous, that is, to yourself and others. It may nevertheless be true. I'm sure she doesn't believe it is at all true, but I think that some versions of that theory are not only plausible but likely. We've discussed that at length here: it definitely appears that the election was conducted illegally and unconstitutionally, and in ways that disabled fraud protections. Every audit or hearing in every affected state has found numbers of probably or definitely fraudulent votes well outside the margin of victory, and a Time magazine article has interviewed those who hired 'armies' of partisan poll workers to count votes.
So I'd say that one is no higher than blue, at least in some forms. The forms being put forward by some people who allege secret servers in Italy or wherever may well be much less well-grounded.
In her top category, I would dispute that the use of the phrase "Cultural Marxism" is necessarily anti-Semitic, and definitely not a conspiracy theory. Most people who use the phrase probably don't actually know who the Frankfurt school members are, or that they were Jews. More, they're not objecting to anything essentially Jewish about the school: they're objecting to the Marxism, which is formally material atheism.
And it's not a conspiracy theory that these people existed and published works expressing thoughts and ideas that could be fairly characterized as a sort of Marxism applied to cultural issues. You can go read the books at the library. Objecting to a set of published ideas is not a conspiracy theory, and it's not anti-Semitic if your objection is to the ideas and not the people (who aren't all that Jewish anyway if they're Marxists, which involves a denial of the God of Israel).
Broadly, though, I think she's not too far off. Tim Pool points out that she had to drop "Bill Gates is Microchipping People' because that one turns out to be true; sadly, instead of moving it to the green sector she left it off the list. It's an interesting and useful idea, trying to sort these in terms of which ones are really true, plausibly true, or wildly untrue. What do you think about all this? Are there any you'd move up, or down, on the chart?
UPDATE: On reflection, I think there are several top level items that are in no way essentially anti-Jewish; a few of them are barely or not conspiracy theories. There’s definitely a push by trans activists, who clearly do have an agenda; you can object to the ideas they’re advancing without ever having a thought about Jews enter your mind. They’re not even obviously related topics, since Judaism has a traditional sexual law very similar to Catholicism and not all that different from Islam. So this topline category may need examination.