Earlier quoted context omitted.
This is definitely incorrect: > The hate isn't "spreading through social media" the hate and the fear were already there. If extremism couldn't be effectively spread, extremists wouldn't bother trying. But they put quite a lot of effort into recruiting and propaganda. For those interested, I strongly recommend Neiwart's "Alt-America": https://www.amazon.com/dp/B01MT2KCB2/ He's a journalist who in the 80s and 90s was…
Extremism was spreading long before the internet. We literally had a cold war to try to stop the spread of communism not to mention there are countless examples in history where the populace was swayed by extremism. The nazis didn't have internet but they were perfectly capable of getting people lined up for war. It's definitely not the technology, they will find any method they need to spread their message.
Sure I can go down in the streets, shout my hate speech at the top of my lungs, put propaganda flyers in random mailboxes, &c ... Or I can upload a video to all video hosting websites and reach more people a single day than I could do in a lifetime of organic propaganda.
It's like saying internet didn't reshape the world because we could already send data over long distance before, yeah sure if you consider that a boat going from EU to US with hand written letters is just as good as our current 60 Tbps ocean internet cable.
Also, don't forget that the Nazis were elected to power and were the official government, it's much easier to use propaganda when you're in that kind of position.