I'm torn between whether the internet radicalizes people into nazis or if it merely exposes them as what they've always been.
Neo-Nazis pre-date the internet, especially in the UK. There was an intersection of football hooligan-ism, skinheads and Neo-Nazis in the 1970s and '80s. Being a football fan was a way of life, and a way to make social connections, and there was the same disenfranchisement of youth and the poor, and the same desire to blame everyone "other", as there is today. The internet makes it easier - easier to spread your ideology, easier to talk about it without being shouted down, easier to organise events.
But it is still leaned behaviour, from social groups and peers, regardless of how the ideology and message is delivered. It's why all the "Yeah, but Free Speech" can go die in a fire when it comes to Nazi beliefs, as I argued a few pages back.
If Bannon is fired I expect that will be Trump's first real opportunity to lose support from his base.
Especially if it comes in the next few days. There'll be no other way to read it than "We need to purge the Neo-Nazi White Supremacists from our ranks" - a way of showing that the Trump Administration really doesn't align with Neo-Nazi hate groups. Even if that isn't actually the reason, that's how it'll be interpreted.