> No, it's not. The alt-right uses anonymous web boards like this one (but not HN to my knowledge) to coordinate and celebrate mass shootings that are directly admitted to be race-focused and white-supremacist-led. (Edit: The alt-right does use HN to spread hate and their "ideology", but I have not seen direct specific calls to violence here)

I'm not sure they are calling themselves alt-right or match that description. They are also not coordinating attacks but posting their manifestos and celebrating is correct.

I could of course be wrong and I know that the alt-right movement has been mired with white supremacists and others from the start but I did like the description when it at least on surface was not about that but a different take on the dominant version of the right-wing in the US; similar to the tea party movements or difference between socialism and democratic socialism.