Overwhelming Force the Answer to 'Dangerous Ideas?'

We are used to thinking of a “dangerous idea” as the sort of thing an intellectual community might want to suppress, or a government might want to censor, or a publication might want to deplatform (or actively platform, for that matter), all so that society remains safe from the idea’s purportedly harmful effects.
But what if the harm were spiritual? And the danger it posed infinite?
What if an idea was so dangerous that it would lead to the eternal damnation of your soul?
What would you do with this idea? Would you box it up, stamp it out, crush any mention of it? Or would you debate it?