Wait a sec…we’ll talk about Isa(AS) and Imam Mahdi later.
The issue at hand is Mirza Sahib being mentioned in Quran as a messenger!!!
You said “Akhreen” is referring to Mirza, lets read the ayat again.
(2. He it is Who sent among the unlettered ones a Messenger from among themselves, reciting to them His Ayat, purifying them, and teaching them the Book and the Hikmah. And verily, they had been before in manifest error.) (3. And others among them who have not yet joined them. And He is the Almighty, the All-Wise.)
According to you, Akhreen(others among them) is referring to Mirza Ghulam Ahmed.
So if I take Ahmadis translation (which I highly doubt is wrong but for the sake of getting to the conclusions)… "Mirza Ghulam Ahmed has not yet join them(the Umiyeen means Arabs here).
It doesn’t really make any sense. What does it mean that “Mirza Ghulam has not yet joined the Arabs”???
PS: Akhreen" means non-arabs and not mirza or a messenger.