but why have the so called moderates also been so inactive on the problem.
I strongly suspect it’s a lack of funding. Moderate parties aren’t getting the money and bot farms that the right are enjoying, and governments presumably walk a tightrope when it comes to calling out bollocks due to allegations of bias, and propaganda, as well as a justified suspicion that they are all in it together/for themselves.
Better education is the solution but there’s a missed generation or two and again, funding and other priorities.