Yes, it's long been known that it was a lie and excuse, it's sad that people on this site somehow aren't aware of this. Trump had two neo-nazis in his administration, this is just some of the fallout of that.
Bold claim. Who? Proof?
Stephen Miller and Stephen Bannon.
Here's some info on Miller:
https://www.splcenter.org/hatewatch/2019/11/12/stephen-mille...
https://www.npr.org/2019/11/26/783047584/leaked-emails-fuel-...
https://www.nbcnews.com/news/latino/white-supremacy-was-behi...
And on Bannon:
https://www.vanityfair.com/news/2017/09/steve-bannon-has-a-n...
https://observer.com/2019/05/steve-bannon-afd-party-germany/
Bannon wasn't there for the whole presidency, but he still did damage. Miller is the reason why child separation became a thing.