I'm interested in why you could see this. My understanding of the cultural leanings of the US is that something like this would be almost impossible to get passed as federal law, or as a constitutional amendment. Congress can't even agree on generic funding bills without a party war over immigration. The last couple congresses have spent most of their time doing everything possible to jam operations of the executive branch.

I just don't see a hate speech law ever passing in the USA, not without a dramatic change in the political climate, which I also don't see happening any time soon.