yeah sadly i think they couldn't reach very high, at least materially, even though a lot of people gave a lot of themselves to do so. they achieved a lot of recognition socially though
> They are good for one thing and one thing only: meeting other people who are just as angry as you about something
Also, Pegida was Nazis protesting that there wasn't enough Nazism happening, so I don't know why you bring them up as an example of a successful protest.
France's "yellow vests" or Germany's "Pegida" might disagree with you on that one. Both were pretty darn effective.