Have you read a source on this cause/effect or did you divine it from other things?
I'm curious about it either way
I did not gain my viewpoint from a single source but my view is primarirly from my knowledge of Islamic Fiqh (primarirly Hanbali and Hanafi), records and estimation of slavery, the religious experience of the Shurha and radical Shia sects who rebelled against the Khilafah and primary sources from the scholars, Khilafah, Shurha, Imams, Bishops, etc...
I just expanded upon it by adding these sources and knowledge together into a coherent argument.