This is actually a great comparison, and we can look at the proliferation of anti-witchcraft propaganda leading to the brutal murders of thousands of women and queer people for a prototypical example of the very real damage caused by disinformation.
persecution of non-straight people is not new. are you wanting a source for linking queer and witchcraft specifically as one, as I'm not sure that's what the GP was intended even if the wording leans that way.
It's hard to see what else might have been intended, since this phrase seems to be linked to the "anti-witchcraft propaganda" phrase, with nothing else dangling there to apply it to.
