It could be that they can't handle the cognitive dissonance. When something you strongly believe (ivermectin doesn't work / is dangerous) is disproven and you realized your strongly held belief is false, it can short circuit your brain and make you go full denial.
It could be that they can't handle the cognitive dissonance. When something you strongly believe (ivermectin doesn't work / is dangerous) is disproven and you realized your strongly held belief is false, it can short circuit your brain and make you go full denial.