so you want to see it coming when it graduates from speech to action.
Id argue that if the folks who held those beliefs had no platform to coalesce and get frothy and coordinate, there would be no action to worry about.
These fringe folk have existed for centuries. Only now have a public place to congregate and share, while pulling in more meek-minded individuals, amassing a following that would have never happened if it werent for the platform itself.
Again, if the hate speech is removed, it never happened. 1000s of eyes never see it and no opportunity to amplify/engender others that may be easily manipulated.