However, if a rejected pull request can be overridden, then that pretty much rules out having PRs anyways. Perhaps Isaac should be able to merge his own PRs. If that's not the procedure, then it's not procedure.

Again, maybe I'm totally missing something here. I believe people are pissed because of the content of the commit that was rejected/reverted, but you have to separate that from what seems to be a run around the established policy.