This is wrong. Even in recent decades nationalist movements were stronger with better organization and leadership before internet culture. The internet leads to leaderless movements without organization. In the past you were forced to have leaders and organization.

if it wasn't for the internet we probably would've never even become aware of just how much anti-white hatred there truly is

On the flip side the internet has made the culture more anti white. Wokeness is a product of internet culture from the past decade. That is why up until fairly recently you could still make all white tv shows or movies and there was no controversy over this. Now when a new LOTR show is made it of course needs to be diverse while when it was made in the 90's early 2000's it could be all white.