I suggest we go back to basics, and follow the Disputes guidelines

AFAIK, this did not happen.
No East Jerusalem mapper contacted any other mapper to try and work out a solution.

They did, however, contacted you. But instead of “mediate the dispute” - You carried out an action.
There was no mediation whatsoever!
The change was made in the morning of the meeting that has taken place in the evening.

That is so wrong in so many levels!

Mikel, you became too involved in this situation, and I ask you to take back your actions with the DWG, ask the DWG to revert the data to the way things were before last week, and ask either user:Blackadder or user:Rw to mediate.

talkat.