"If Islam is a religion for all of mankind then why is it so distinctly Arab?"

Islam is an imperialist and imposing faith, it brings with it distinctly Arab values and traditions, if God saw this as an issue for making it universal then he surely would've changed it..? Right? ↓

No, Islam came as it historically did because Allah willed it to, therefore it is good for Muslims to accept the origins and distinct values that Islam carries without needing to make an explanation complex, it's as simple as; "Yes, Islam is an Arab religion, for man to accept."

What's wrong with the fact that it's chief language is Arabic? Nothing is, Ajams make this an issue because they want to reconcile and cope with the fact their nation didn't successfully be honoured with the last prophet and subsequently Islam in its final form.

If Muslims have an issue with how Islam came to be then they're having an issue with what Allah willed, we know Allah preserved Islam to come to us through Muhammad SAW, therefore it's totally valid by Islamic standards.

Every Muslims, Arab or not should have Islamic standards.