The difference between this revolution in social media influencing, and previous revolutions in social media influencing seized and used for fascism such as the use of new radio preceding WWII, is this:
With radio, you were told things by a trusted stranger and believed them because it was on the radio and, thus, news.
Now, you are told things by what is apparently the personal friend of your personal friend, 'privately'. And you believe them because it is real. Your friend said so. Sort of.
It's an advance in propaganda technology for SURE. I don't know where it goes, but it's not like humanity hasn't had to weather this sort of thing before. The parallels are completely obvious, historically. It is nothing more than recontextualizing how to get information past critical questioning, and it's just as effective as the first radio was in its day.