It seems sensible, at the very least, to ensure their research meets the highest standards of rationality just as they ensure STEM meets high ethical standards.
I also think it's worthwhile to ensure those departments are completely inclusive and don't exclude Christians, white men, the right wing, etc. A principled, rational approach to inclusion can help ensure that the social departments are truly representative of all the people.
Edit:
This isn't a description of grievance studies as it currently exists, rather it's an answer to the question "what should we do?" - we should advocate and lobby for something like this, I think.