Isn't that exactly what they indicated that they planned to do? I.E., take their money elsewhere.
BTW, I missed the part about anyone "screaming" about being offended.
Regardless of your position on the issue of the content of the pro-evolution films (as defined in the article), you seem to be proposing exactly what the "offended" people were planning on doing, yet somehow attempt to give it an aura of being "bad".
I certainly hope it is still ok in America to take their money wherever their interests, beliefs, or perhaps in your view, their "prejudices" lead them.
Then you should read the article again:
Responses like "I really hate it when the theory of evolution is presented as fact," or "I don't agree with their presentation of human existence" doomed the film's chances. "Some people said it was blasphemous," says Carol Murray, the museum's director of marketing. "If it's not going to draw a crowd and it is going to create controversy," she concludes, "from a marketing standpoint I cannot make a recommendation" to screen it. [...] Bayley Silleck, who wrote and directed "Cosmic Voyage," another IMAX offering that drew religious complaints, expects to encounter criticism on his upcoming project about dinosaurs.They sound offended and vocal to me.