I have never written a post like this before, because I generally do not care how StackOverflow is moderated or run. I apologize if this is overly wordy.
There is an active question which asks about another of the interchangeable antivaccine theories. To support that this theory is notable, the author links to a very antisemitic article on a crank website, where the specific question is surrounded by a very lengthy piece which blames the Jews for both the pandemic, and for vaccine-caused genocides.
I would argue that these sources should not be allowed to support notable claims. If the only source for something is a bunch of jewish space laser cranks, it's not notable. Find something that isn't horrible to link to.
That however, is not the position of the moderation team, which is not great. I don't think this platform is obligated to allow these people to spread their hate, but I can write skeptical responses to horrible anti-jew tropes. There's merit to allowing these people to talk so that you can smash their terrible ideas, and it's a position I can at least live with.
I wrote an answer to this question, which also specifically addressed the antisemitism that was all over the link advertised in the question. This answer had some upvotes, and had some downvotes (a reasonable number of people thought that parts of the answer were somewhat off-topic because the question itself didn't actually blame the jews for anything).
Then one moderator vandalized my answer, and another moderator told me to delete the part of the answer that addressed the antisemitism. When I declined, it was deleted by the moderation team. This is not acceptable. Allowing people to spread their horrible racisms or antisemitisms and specifically prohibiting skeptical analysis of these positions is not acceptable.
It does not matter that the policy you are enforcing is ostensibly position-neutral (for the record, I do not believe that the moderators would have enforced the policy in the same way if the position in question was anti-white racism instead of antisemitism). You have created a set of policies that allows me to fill a question with horrible racisms, and as long as I carefully ask a question that's tangential to the racisms, I get to spread my terrible opinions while nobody is allowed to respond.
You need to either change your policies to prohibit links to this type of content or you need to allow people to tear these terrible ideas to pieces. This is not the first time someone has brought up the problem with bad sources. I would like to specifically note that the moderator who deleted the answer that prompted this post has an opinion about why these links should be allowed:
We don't want idiots to become martyrs
By refusing to directly tackle bad ideas, we allow the proponents of those ideas to paint themselves as unfairly treated, and suggest that the ideas they have are so dangerously effective, the establishment is stopping them from sharing them.
By demolishing the ideas with evidence, we remove this opportunity.
We want the claims to be challenged
When someone naive tries to investigate these claims, trying to decide whether the denialists have a point, we want there to be Google hits to demolish their arguments. We want the aggrieved parties of the defamatory falsehoods to have a platform where they can present the evidence for the truth.