While Redhat did not handle this situation well you are also being very unfair to them. Why would they waste their time trying to contribute to a dead project? If I see that patches do not get merged and that bug reports go unanswered I will not bother doing anything because I know my time will be wasted, and I do not fault RedHat for doing the same.

What they should have done is tried to reach out to you before forking.