This isn't about free speech. People NEED to hear, read, and see conflicting viewpoints and opinions they don't agree with. They NEED to see the ugly realities of life. The opposite is a culture of censorship, which is absolutely unacceptable.
Also, your account unfortunately has a history of posting unsubstantive and flamebait comments. We ban accounts that do that—we have to, because they destroy the curious conversation that HN is supposed to be for. I don't want to ban you, so if you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd appreciate it.