The reason was given as the last post on that thread, I suggest you read that
Again, this is not a vaccine forum, there was a lot of heated back-and-forth, and nothing good would come out of it if let go on (as heels dig in and people get defensive about
their point of view, the insults get worse and worse, and inevitably turn into a flare war). It was allowed to go on for a while as a compromise, but is better discussed in vaccine-themed forums of which there are options for those who are interested within that subject. Cheers!