I took a taste of attacking yogic ideas in a yoga discussion group.
It is quite interesting to see the very same reactions that christian fundamentalists would show: They interpreted the idea that was under attack in a metaphorical way to save it, they attacked the person to discourage criticism, they engaged in mind-reading and took offense at having their faith attacked.
It makes perfect sense. Every "spiritual path" is really just as dogmatic, closed to change and intellectually fragile as any other. It's not the content that matters; whenever you accept anything for religious reasons, you will tend to jump to defend it against attacks, or silently retreat from the discussion into some weird form of "tolerance". It's fight or flight. You have no way to defend your belief intellectually, therefore you have to react with anger and violence.
The virus was hidden in the way you adopted the content, not in the content itself.