But no one should be jailed for giving an opinion about a religious holy figure to even 100 billion people.
Freedom of speech is not a popularity contest. It's either free or it's not.
Consider my example with Martin Luther King, Jr. MLK is a hero to many in the US. Many people think he was wholly just and would never have done something like participate in something like a threesome.
If someone argues with evidence that MLK did indeed participate in a threesome, should they be jailed for simply voicing their opinion on a matter that many people hold dear? OF COURSE NOT.
Nor should someone be jailed for expressing an opinion of Mohammed that you are 2 billion people disagree with. That's ridiculous and barbaric to jail people for expressing an opinion.
From the quote I provided, he wasn't even saying anything vitriolic. He was trying to make a point, it wasn't just hate-mongering. There is NO reason why he should have been jailed or faced ANY repurcussions from the law at all. NONE.
That someone's freedom of speech should depend on how well-liked their opinion is or not is the most egregious "reasoning" I've ever heard to oppress someone.