I think he’s saying that’s when those movements really started to gain traction (civil rights, feminism, gay rights).
OP, while this topic would be difficult for a grad thesis, it might be a good learning experience for an undergrad sociology class or the like. I don’t know about hyperfocusing on weeaboos and furries and such, since how many people have direct experience being one of those stereotypes? Maybe the paper could be about how to teach people about discrimination in general (such as the Jane Elliot experiment above, or the lines thing I posted), without trying to artificially transpose one form of discrimination onto another.
If, on the other hand, your sympathies lie more with the weeaboos and furries and the discrimination THEY face, then just focus on that – it’s an interesting enough topic on its own – without muddying the waters with the still-very-real, and much worse, discrimination that blacks, gays, and women face.