I guess all I can offer is a bit of an analogy? Or...similar situation? Words.
In mental health, something I personally deal with, there is a distinction between sympathizing and understanding the pain of another who is mentally ill. Understanding they are in a situation out of their control which leads to behaviors and problems in their social setting is needed to help bring understanding and better terms for both sides of the mental health community.
With that said, it is not an excuse or pass to project the frustrations of being mentally ill on someone nor use it as a way to excuse the negative behavior it brings.
May isn't mentally ill, but she is in a situation out of her control and has sympathy for that because of her attempt to in some ways to get better, hence why she's tolerated by some like Dale or Momo, which is where I see her on one side of the analogy. Winslow sits on the other side of the analogy, of someone mentally well. On this he is, and has shown, to be a very kind and understanding person. So what this doesn't give May a pass on is the projection of her frustration of seeing someone on the other side who genuinely did not or does not understand why it would be a problem. Even at the lowest of my own low, it was encouraged to explain my frustrations of mental illness without insults or in a rude and resentful manner.
Is her frustration warranted? Yes. Is her projection of said frustration on Winslow in a resentful manner warranted? No. And this is where May is in the wrong. Not because she feels mad, but because she chose to let her anger manifest in hurting another who genuinely has never shown to be a bad person. Furthermore, it seems May is aware of who Winslow is and so most likely is aware of his personality, seeing as she goes on about him (in a very resentful way) to Momo. This is where, again, she is in the wrong. Not in her being mad, but because she is disparaging a person about a perceived slight. She is filling the blanks of Winslow's intentions with hate and bitterness without even attempting to try and understand Winslow's side of why he wanted a body or even that he may have not understood why it made her mad.
Now of course, May is that kind of character. This isn't a call to say "MAY IS BAD AND REMOVE HER FROM COMIC PLZ" it's simply an observation and assessment of what she's doing and where she has crossed this perceived line.
And if there is still character judging happening, Momo should also be noted to be extensively passive in her interaction with May to the point of almost enabling the behavior, as she may know Winslow the most (second to Hannelore) but allows the topic of "privilege" to over-ride her reasoning to be able to understand why May is mad and accept that while also perhaps coming to the defense of her friend who genuinely did not know why this would have been an offensive thing to May. Momo isn't bad for it, but it's not a very good personality trait to have.
All I hope is that by the end of this arc both Winslow AND May learn something a bit from this. Winslow learning privilege comes in all shapes and sizes and to think about the person they're going to and understanding their side without considering. May for learning to work on her anger and think before she speaks, allowing understanding of the other side instead of assuming.