2. This book of chronicles was written in a really late date about 500 BC , it is also not known who wrote it , tradition holds its Ezra peace be upon him but it is only a claim . Chronilcs retells all the stories of the bile from a late jewish prespective.
I would also like to add where Ishmael lived according to the samaritan book Asatir (legends) of Moses Chapter VIII , Birth of Moses:
1. And after the death of Abraham, Ishmael reigned twenty seven years; 2. And all the children of Nebaot ruled for one year in the lifetime of Ishmael; 3. And for thirty years after his death from the river of Egypt to the river Euphrates; and they builtMecca.; 4. For thus it is said (in Genesis 25:16): 'As thou goest towards Ashur before all his brethren he lay
As for what you said concerning the sentence which I coloured in red was already known for previous Jews:
in the jewish book the secrets of Rabbi Shimon :
ince he saw the kingdom of Ishmael that was coming, he began to say: "Was it not enough what the wicked kingdom of Edom has done to us,
but [we deserve] the kingdom of Ishmael too?
" At once Metatron, the foremost angel (sar ha-penim), answered him and said: "Do not fear, son of man,
for the Almighty only brings the kingdom of Ishmael
in order to deliver you from this wicked one (Edom).
He raises up over them (Ishmaelites) a prophet according to His will and He will conquer the land for them
, and they will come and restore it to greatness, and a great dread will come between them and the sons of Esau." Rabbi Simon answered him and said: "How [is it known] that they are our salvation?" He (Metatron) said to him:
"Did not the prophet Isaiah say that 'he saw a chariot with a pair of horsemen etc.'? Why did he put hte chariot of asses before the chariot of camels when he should rather have said 'a chariot of camels and [then] a chariot of asses,' because when he (Ishmael, i.e. the Arabs) goes forth [to war], he rides upon on a camel, and when the kingdom will arise by his hands he rides upon an ass? [
Given that he said the reverse of this], the chariot of asses, since he (the Messiah) rides upon an ass,
shows that they (the Ishmaelites, represented by the chariot of camels
) are a salvation for Israel, like the salvation of the rider on an ass (i.e. the Messiah)."
Source : (Simon ben Yohai, Secrets, 78-79 [pp. 309-310])