What's so scary about a Christian's opinion?

Why are those who disagree with Hume calling for censorship?

Perhaps because a sudden outbreak of spiritual healing and moral decency among high profile people would wipe out the lucrative reality TV industry.

Perhaps because the decline of narcissism would would destroy the melodrama that medicates meaningless lives.

Nothing new:

About that time, serious trouble developed in Ephesus concerning the Way. It began with Demetrius, a silversmith who had a large business manufacturing silver shrines of the Greek goddess Artemis. He kept many craftsmen busy. He called them together, along with others employed in similar trades, and addressed them as follows:

“Gentlemen, you know that our wealth comes from this business. But as you have seen and heard, this man Paul has persuaded many people that handmade gods aren’t really gods at all. And he’s done this not only here in Ephesus but throughout the entire province!
Acts 19:23-26