Nobody "dogmatically hates the drug". It is an excellent treatment for parasites, cheap and well-tolerated as parasite treatments go.

Many have reason to hate people who advocate for dosing with anti-parasite drugs instead of getting vaccinated, because it makes people die. Many people have family who were not protected, and died, unnecessarily. I am not among those. But my brother rejected vaccination, and his wife and kids all got COVID. (He was away.)