I can help you create an RFC, but you need to propose a neutrally-worded sentence saying what change you want to make. Do you want to add: 
"Yemen was home of the Sabaeans (biblical Sheba), a trading state that flourished for over a thousand years". 
You can propose this in the RfC, but people who have commented so far are unlikely to support that. You would be hoping that the listing of the RfC would bring in more contributors who might agree with you. It sounds like the current contributors want everything to be extremely well-sourced to respected scholarship, and they don't want anything said beyond what is known for sure. E.g. they doubt that we know the exact location of the Sabaeans. You have been writing at excessive length and this discourages dialog.