Could you kindly say how you infer that it is meant for the Jews? Pl appreciate that this word 'brothers has not been used anywhere else in this cotext. If itt was for Jews, God would have said 'from among them' and not "from among their brethren". You are aware that Judaism, Chritianity and Islam are called Abrahamic religions and accept Abraham as their patriarch. Hence Jews and Muslims are brothers and mohammad fits in the prophecy well.
Incidently you have not replied how this prophecy fits Jesus; pl give scriptural references.
Let us get out of our cells and widen the spiritual perspective. Islam is a reality, it owes full allegiance to the Old Testament and recognizes the New Testament as a scripture. It even recognizes Virgin Mary and Christ's miracles, but does not agree with the status given to him equal to God. It says there is only one God, He alone is to be worshipped. For the same reason it does not accept the Christian Trinity. These latter are only dogmas and probably may be relooked. Keeping in mind the unity of God and brotherhood of mankind.