I'm not sure what you think you're proving with that link. CDA 230 does something very close to the opposite of what you seem to think that it does. It protects the providers of interactive computer services from liability, but it does not restrict their control over whether to provide those services or not, which would of course obviously be a violation of those interactive computer services' first amendment rights. CDA 230 protects, it does not restrict. The text of the code is really quite straightforward and easy to interpret if you do it in good faith, putting your ideology aside.