I’m an atheist, which is a minority group. As such, I am often deeply offended (wink-wink) by the abject stupidity, irrationality, and absurdity of god-belief by otherwise intelligent people who seek, by subtle or unsubtle means, to convince me of the “error” of our ways whenever the subject arises. Do we get a sensitivity reader? Or are the majority’s converse sensitivities weightier in this case?
Yes, whether you are part of some misunderstood minority group is also pretty much an arbitrary thing. I notice they exclude pedophiles from being a marginalized group. But I can think of very few groups that are quite as marginalized; it is precisely because they are so marginalized that they end up molesting kids.
It occurs to me now that being "offended" is actually an inevitable by-product of precisely the diversity that these SJWs want so much in the first place. Have a society with a melting pot of cultures, and misunderstandings are going to happen.
Well, there are many shades of gray here anyway. I have nothing against having some beta readers go through a manuscript to ensure accuracy and authenticity. If I want to have, say, a poor black kid from a rural township play an important role in my story, then I don't at all mind the idea of giving the manuscript to people of that background to check that I wrote the character accurately. I would actually be very reluctant to write at all about the experiences of people way outside of my own culture (the first rule of writing is "write what you know about"), but if I did, I would actually be pretty paranoid about getting things embarrassingly wrong.
But this is not all that the sensitivity readers are checking for. Have a white character even think something bad or stereotypical about the above-mentioned township kid, and they jump down your throat about it (unless, of course, you have your character corrected at some point). I think the whole purpose here is actually just to make sure that only white males can be bad guy characters. Having a bunch of white characters beat up our hypothetical township kid is okay; having said township kid steal something or murder a farmer is "offensive."