I think you're making a mistake, here, by looking at this through a partisan lens (which, unfortunately, seems to be the default way of seeing the world for a lot of folks these days; one need only look at some of the other low quality replies to your question to see that in action).
The Satanic Panic, for example, was not, as far as I'm aware, a partisan conspiracy theory. Unlike QAnon, which is clearly aligned with the far right, the Satanic Panic was very widely reported in media and believed by the public and law enforcement.
The same is true of many other urban legends that lead to moral panics (e.g. "rainbow parties").
The Satanic Panic, for example, was not, as far as I'm aware, a partisan conspiracy theory. Unlike QAnon, which is clearly aligned with the far right, the Satanic Panic was very widely reported in media and believed by the public and law enforcement.
The same is true of many other urban legends that lead to moral panics (e.g. "rainbow parties").