What RMS has a problem with is the fact that companies don't (and shouldn't) always tell you how their products work. Just because you bought something doesn't give you the right to know all of its secrets. If he (or you) is not ok with that, then fine, he lives in America, he has the freedom to disagree. His solution, however, is to try to restrict the freedom of people and companies when it comes to software and software reuse. That's what I have a problem with.
Thankfully, I think LLVM and clang represent the coming ultimate triumph of the Berkeley school of software freedom. The clouds of the Cambridge school have overshadowed the software world for far too long.