The thing with SJWs are that like ideologically motivated groups of people, they eventually get lost in their own ideological rhetoric.
Fortunately, like all ideologically motivated groups of people, all you really need to do to get them to stop talking is to start talking about actual research and statistics.
It's like communists, they talk all this mad **** about Marx and inequality, but if you have some decent knowledge of the literature/current research on inequality you can easily stump them in all of two minutes.
I mean ****, some of my work is on threat perception, which inevitably relates at least partially to race/coalition, however, if people start going all SJW on me when they ask what I do, I just start randomly going through my 20 page literature review, then they stop talking because they haven't considered the matter beyond "I know everything about this topic because me and my friends talk about it or based on my subjective experience I know that..."