It's not even a US-centric view of speech; it's just absolutist internet nonsense. The US, like other countries, has a very complex set of case laws that govern speech. Though hate speech is basically protected, incitement is illegal. Doxing in and of itself is not usually illegal, but on the Internet doxing is usually done as a part of some scheme to blackmail, threaten, or harass someone, all of which are criminal. US speech laws are less restrictive than the laws in many European countries, but to paint them as just some sort of carte-blanche is not correct.