Good point, this could just misrepresentat the situation. I also haven't looked over the mailing list thread and comments here are very salty.
But giving him the benefit of doubt of a nice potential contributer who just debugged a very hard issue and sending in a basic concept of a potential fix. I think it would be beneficial for their community to take the wish for more credit more serious and try to make him feel welcome. But I recognize it was probably hard to do in this case.
Overall I just wanted to recognize that I do see how he feels robbed of his contribution. It reminded me that I also had an experience with the kernel developers that made me not want to contribute again.
Überall diese merkwürdigen Zettel in meiner Handschrift. Es muss wohl auch ein größeres Loch sein, die haben die ganze Straße aufgerissen.