Academic scholars such as Angelika Neuwirth, Christoph Luxenberg, Patricia Crone etc. examine early versions of the koranic texts and appear to agree that Arabic is not the mother language in these original texts, which makes sense given the Arabs were predominantly illiterate.
Scott's hypotheses are largely derived from surviving historical artifacts. Ask yourself, is it mere coincidence that throughout the existence of Islam, doctrinal jahiliyya triggered the elimination of artifacts and evidence contrary to islam's established narrative of supremacy?
What is really new here is that there was no conquest of Persia.. at most a subversion.
There are plenty of theories around that Muhammad and Christ did not exist.
Whether they did or not exist is not a problem to me.(an agnostic)
In the case of Muhammed the problem is what Muslims believe , and not what you or I believe or what is true or not true.
Islam is a fatal religious belief for us Infidels, when Muslim believers are willing to kill us and die for their beliefs.
Christianity is not a fatal threat to others if you don't stay in the religion or join it, if the New Testament and the 10 commandments are followed.
The only threat Christianity poses is it is no match for Islam in its naive be nice to others belief system that Muslims will take advantage of, and are doing that right now -Tom