Interesting article. I was aware that Islam is a heresy of Christianity, but didn’t know many of the details.
On the linguistic side....
Aramaic comes from the Nothwest Semitic branch, if I remember right, and Arabic comes from the Central Semitic branch. Christ’s last words, “Abba, abba, lema sabachthani?” are Aramaic for the phrase we all know as “Father, father, why have you forsaken me?” Abba = father; in Arabic, ab means father. Lema = why; in Arabic, limatha. The -ni on the end of sabachthani refers to “me”; the same ending is used in Arabic.
The Hebrew (and Aramaic) amen means “I believe”; in Arabic, amanu (although the -u ending on verbs usually isn’t pronounced except in formal situations).
Just curious ... how long have you studied Arabic and are you familiar with some of the dialects?