http://www.theguardian.com/society/2004/jul/30/health.mental...
But that's not the point, is it?
It doesn't really matter whether he's right about gender dysphoria or not. Coraline is requesting his removal as a contributor because he has publicly stated his opinion on this matter, and that opinion is unacceptable to her.
As far as I know, what he did didn't even violate Coraline's own (excellent) contributor charter:
http://contributor-covenant.org/version/1/1/0/
"This code of conduct applies both within project spaces and in public spaces when an individual is representing the project or its community."