[shenberg]

That's really not true, e.g. the wikipedia page on population transfer in the Ottoman empire[1]. This dates way back to the Assyrian and Persian empries explicitly moving conquered peoples around in their empires in order to safeguard their rule. This book on population transfer in the Ottoman empire[2] explicitly states, with references, that the Ottomans habits were inherited from the steppe Turks, the Byzantines (=the Romans) and the Arabs.

[1] https://en.wikipedia.org/w/index.php?title=Population_transf... [2] https://websites.umich.edu/~gocek/Work/ja/Gocek.Muge.ja.popu...

[sudosysgen]

There were of course population transfers, but there mathematically could not move enough people from the Arabian Peninsula into conquered regions.