I don't have a citation, but apparently he was interviewing Trump, and Bannon made the comment that there were 'too many' tech CEOs in Silicon Valley who were Asian. Trump replied that he had no problem with immigrants so long as they came legally and were smart and skilled and contributed to the economy. Bannon said that as a nationalist he 'was to the right of [Trump] on that point.' Trump replied that this was 'fine.' I believe that you can find the citation on the Joe.My.God blog which has been carefully following the Breitbart/Bannon issue throughout the election.
I read it. For example:
http://www.vanityfair.com/news/2016/11/steve-bannon-racist-comments-silicon-valley-inaccurate
Many left-wing media outlets are insisting that that was a racist comment made by Bannon.
I don't see any good evidence of that. The evidence on which they base their assessment and their accusations against Bannon on the matter is seriously poor. Bannon wasn't talking about "Asians" in the sense of the Mongoloid race, or something like that. Rather, he was talking about people who actually came from Asia, and weren't American citizens.
Was his comment racist, or nationalist, or both?
Maybe he is a racist and it was a racist comment, but it's epistemically irrational to believe so on the basis of the information available in the articles who call the comment "racist", or call Bannon a racist for making it.
The most extreme say things like
"If You Think Donald Trump Isn’t Going After Asians, Think Again", on the basis of Bannon's comment, despite the facts that Bannon's comment is not clearly against Asians in the racial sense, and the more salient fact that Trump
disagreed with Bannon on the matter, and said "We have to be careful of that, Steve. You know, we have to keep our talented people in this country".
And then, nextshark goes with that title, and says "While Donald Trump has yet to openly target Asians, an excerpt from a past conversation between Bannon and Trump posted by The Washington Post indicates we should be cautious".
No, the excerpt does not remotely indicate that.
There is zero reason to believe on the basis of that excerpt that Trump is targeting either Mongoloids, or people from Asia due to their being from Asia.