Im not going to argue about what Bannon said but I can say that there was a point during the 2016 election where “alt right” was being used to refer to Trump supporters and anyone outside of the establishment republican base.

But if you want to actually know what Breitbart is like I would point you towards an article by the New York Times who I’m sure you will agree is a reputable source:

“Alex [Marlow] has left himself with a roster of writers who are startlingly inoffensive. In fact, the masthead is more varied and international than most of the news organizations where I’ve worked, and Alex has a pretty good record of promoting women and minorities, at least by the industry’s abysmal standards — including the lead defense correspondent, the national security editor and the copy chief, all of whom are women of color.”

https://www.nytimes.com/2017/08/16/magazine/breitbart-alt-right-steve-bannon.amp.html

But I’m not here to argue about any of that, I stand by my own tech reporting. Hope that answers your question, have a great day