The FB group should have dealt with this significantly better. I'm assuming they have an admin, who should have removed unwelcoming comments, and posted instead a sympathetic message, which also signposted other sources of support (just as they might do for woman who had a different disease, or did not fit the group for some other reason)
I mean, obviously you've read more on this, or are privy to more information than we are, because that's quite a detailed and cruel scenario you have described there, @AuntieStella, when all the actual story says is:
Facing a mastectomy, and being left to feel as though ‘real men’ don’t get breast cancer, he turned online to try and get support. But, he was told that he could not join because he was a man and it would prevent other members from opening up about their own concerns. He said: ‘I was made to feel like I was muscling in, but the last thing I wanted to do was jump up and down saying, “Look at me I’ve got breast cancer too”.'
He was told he couldn't join because it would upset the women. He never got to post because he didn't meet criteria. I sympathise that he found that hard, but what else should they have said? He couldn't join. Women had shared already, safe in the assurance it was single sex. There was no alternative answer to give him.
Mods won't know other sources of support for men with cancer because they themselves are fighting as women with cancer. They're patients themselves, not universal cancer social workers. And he never got to post, or be met with unwelcoming comments, because you can't join closed Facebook groups without answering questions first.
In many breast cancer support groups, you can't even join until a mod account has friended yours and checked you out carefully first. Which is one of the reasons we feel safe using them.
Why are you so tenderly concerned for this bloke that you invent supportive scenarios, and so contemptuous for the women dealing with cancer who offer their time to help others, that you assume cruelty and incompetence and complain that they don't educate themselves on how to help a demographic to which they do not themselves belong?