This is another claim I've never understood. To me, 'alt-right' is a general term that's clearly being used for different purposes by different groups.  

It doesn't take much investigation to discover that there's the fully blown racists (Spencer et al) that operate out of Whitefish, MO where there's been neo-Nazis for decades, and who ran the 'alt-right' website. Anyone who lives in Alberta is familiar with Whitefish and what goes on down there.

and ...

A Jewish owned, Jewish run, news organization from New York City, with a Jewish raised founder (Breitbart), a Jewish CEO (Solov), multiple Jewish investors, an all Jewish editing staff (Milo, Marlow),  2/3 of their writers that are Jewish, and who use the term in a much more general sense to simply mean 'modern, college educated conservatives'.

Do you seriously think there's any confluence between those two groups? Jewish people and neo-Nazis are pretty rare bedfellows.