I don't see how claiming that the movie is being blocked by the religious right is any less insulting to Americans than saying that its would be hard to sell because it is a slow-paced intellectual biopic set in the 19th century? Movie studios are in it to make money, and perhaps the producer priced the movie out of the indy market but the bigger distributors weren't interested -- slow paced biopics are hard to sell. It doesn't mean Americans are stupid, it just means that this isn't the sort of film that American audiences flock to the theaters to see. Other countries picking it up is meaningless unless we know how much it was sold for and how much he was asking in America. I'm sure the price of distribution rights for say, Sweden, and those for the USA are not at all the same.
The only person claiming that this movie is not being picked up because it is too controversial is the producer, and that's hardly an objective source. There's no evidence backing up his claim, no American company saying "yes, we passed on this one because it would upset the masses." This is a very clever PR stunt, because American studios actually love controversy, the more controversial the better, and the movie they couldn't sell before suddenly has an angle which makes it actually more marketable.
I'll say it again -- movies like Religulous, Saved!, Dogma and The Da Vinci Code, all of which were super controversial, have been released in the States. Religulous was released only last year and it openly ridiculed religion. Seriously, Bill Maher goes into churches and antagonizes religious people, mocks Mormons, provokes Creationists, and pretty much sets out to prove that being religious is akin to having some kind of mental disorder. There is absolutely no way that a movie like that could get picked up but the Darwin biopic is too controversial.
Sorry, this topic is sort of bugging me because I think the very idea that the religious right is somehow blocking a film is ridiculous, and this is the sort of thing that just reaffirms negative stereotyping of Americans as uneducated uncultured hicks, and it annoys me that the producer would go there. Sure, the extreme religious fundementalists are a powerful minority, and a force to be reckoned with in America for a number of reasons, but they don't have veto power over Hollywood movies. They don't have that much power.