Big US companies, and all US companies, big and small, have always choosen, and very carefully, what sorts of content they want to distribute, what sorts of image they want to portray, what sorts of causes they want to publicly support, and what their public imagine will be. You were never able to find atheist content in a Christian bookstore, you could only buy the censored version of CDs from Walmart, you couldn't find pornography at K-Mart, The Disney Channel never broadcasted any politically incorrect material, and you couldn't buy t-shirts with "inflammatory religious or supremacist content" in Old Navy. Even the original Geocities had strong content restrictions.
Are you loudly complaining Old Navy doesn't sell a "Hitler was right" shirt? Are you complaining about the "censorship" going on at the Museum of Fine Arts since they don't have a white supremacist exhibit?
In fact, pornography is legal and YouTube does not allow pornography. Why aren't you already up in arms about that "censorship."