The ethnogenesis of Iranians and Arabs didn't happen because of Islam. Those are two different scenarios that you're trying to compare.
Another Somali who cares about what ajnabis think about us.

Have a backbone niyo. Even
@Halimo Supremist has more balls than you
They can be the kindest people on the planet and they would still be considered ajnabi/Shiisheye.
You know what the word shiisheye and ajnabi have in common? They both mean someone that is far and distant. Ex-Muslims are just that. They have no connection to Islam which is the bulk of our identity. So how could we possibly ever claim them to be our brethren when they are so distant from us?