I think what this boils down to, and is extremely apparent in those quotes, is communication skills & style. People with very controversial beliefs (and in a f

I think what this boils down to, and is extremely apparent in those quotes, is communication skills & style. People with very controversial beliefs (and in a free & diverse society, everything is controversial in some relative axis, hence we need to extend measures of freedom to each other) can still act civilly, or they can flail and be problematic on forums. That's not a feature of their beliefs, but a feature of their behavior (stubbornness, arrogance, etc). People who have fully "correct thinking" in some scope can also be disruptive, poorly behaved members of discussion-based communities.