Well, let's go...(yawn...)
1/ "Roman army" reaction or whatever. Just allusion to the narrative : a man speaking to the Biblical God. It cannot be remains concealed. In Mars maybe, not in Petra.
2/ "He preached polytheists": There is no attestation of polytheists in Petra which is a bishopric since 358. Roman authorities would have not permit it during 3 centuries when one sees what they do about Christian heresies... Gibson is not a historian... (yawn...)
3/ Slavs, Copts? Oh my gosh...
4/ Defending in their forts not the frontiers of "Arabia", (there is no "Arabia" ...) but Persia frontier from north to south(especially against the ARABS of Persia...)
Hegra in the peninsula (Madāʾin Ṣāliḥ) is controlled by the Romans in 350 (coins MARC!).
5/ Arabs known as merchants, etc. Above all as soldiers for the Romans as well and were employed as tax collectors.
6/ "Quraysh" asks the Romans for arms? "Quraysh" ?
7/ "Badr" north of Petra? Moreover, is there a "Badr" battle? I do not think so... as there is no Zem Zem as well (!!!)
8/ "I'm sure that the Romans encouraged..." I'm sure of nothing, I was not there. I'm a historian...
9/"Uhud" my dear gosh...
10/ "Medina"...
11/ "Quraysh"in Petra?
12/ "Trench" battle?
13/"Muslims "? What Muslims ?
14/ "Comet, sky"...
15/ Do I need to say more ? (yawn...)
Gibson's explication shows us that he is a great believer...even with his Petra stuff...