You have fallen victim to the leftwing view of the alt-right. Breitbart is mostly populated with hardened conservatives. Bannon, Nolte, Spiering, Kline, Pollack, etc. Up until the Michelle Fields dustup, it also included editor Ben Shapiro, who is about as middle of the road conservative as can be had.
Most, if not all the provocative BB headlines the MSM splashes in their reports are from Milo, also a conservative, but a flamboyant fag and aggressive anti-SJW. He intends to be provocative - and Breitbart lets him roll.
There are no racists on their staff. Their are no Nazi sympathizers on their staff. But because of their NATIONALIST bent (much like Trump’s) they attract not only conservatives nationalists, but also other nationalists - Birchers, Info-wars types, anti-war and white nationalists.
The white nationalists are mostly NOT the KKK type, but the Vox Day/Derbyshire/Geert Wilders type, with whom I have great respect.
What really grates the NRO crowd is the Bill Mitchell/Mike Cernovich/Paul Watson types shitstorming their sacred ground and making it clear the days of gently losing with the next RINO in line for the nomination is over.
BTW, does the left get jumpy and freak out when communists or black nationalists join their cause?
Most of the people you cited are fine — AND — there are others who have a forum there who are not conservatives, but are alt-right people, which is an entirely different breed of cat.
You say there are no racists on the staff. Maybe, maybe not. There are some who come off as people who are focused on race as the central concern of any people or groups.
I’m not sure I’d describe Milo Yiannopoulos as a “conservative”. He’s the one who wrote “The Establishment Conservative’s Guide to the Alt-Right”, and he has occasionally shown Spencerite tendencies.
KKK or not, WHITE nationalism is a racial construct. Yet, our movement includes people like Allen West, Herman Cain, Alan Keyes, Mia Love, Star Parker, and plenty of others. White nationalists would not find them acceptable, but they are all conservatives (if conservatives of slightly different stripes.) They are living refutation of the alt-right construct.
Does the left get freaked out when Communists join their cause? No, but they should. The Communists are using them. Some honest liberals do speak up against the communist infiltration of their movement, but not enough. But they should.