> If a company says that American Civil War and Lincoln is evil and illegal. It's free speech. How American think about it?

Well it's not like Americans have a long history of television, movies, music, and literature that are harshly critical and even outright mocking of past and current US presidents. Nobody ever depicts Donald Trump as an orange-skinned combover-wearing loon, or Michelle Obama as a health-fascist, or George W. Bush as a big-eared warmongering idiot. That would surely be unacceptable to any American!