Earlier quoted context omitted.
"alt-right" is mostly just a term used by the Clinton campaign to label their political opponents as weirdos. I don't think I heard anyone using it before Clinton did. I suppose Richard Spencer used it. Before the 2016 election, the term was "classical liberal". I don't know about Milo, but at least Alex Jones has described himself as a liberal.
This is the "alt-right" and it didn't come from Clinton. http://www.breitbart.com/london/2016/11/16/translator-migran... frontpage of breitbart today. This article is racist af, and the comments are even worse. This article basically has no source, and is a bunch of anecdotal race war bullshit. The only "facts" are so lacking in context that they are meaningless. Like number of total attacks for example....
To claim that it has "basically no source" is not true. The Breitbart piece links to the German-language article on which it is based. I'll link it here again for you:
The translator whose statements are featured in both the Brietbart piece and the original German article is allegedly a Christian Eritrean woman who has requested anonymity because she fears reprisals from the Islamic asylum claimants with whom her work requires that she interact.
Other people quoted in the German article are indeed identified by name.
Disclaimer: I am not vouching for the veracity of their statements, the integrity of the original German-language publication, or of Brietbart.