73. " and do not believe save in one who follows your religion.
say: " verily the (true) guidance is allah's guidance ö that a person may
be given the like of what you have been given;
or they would dispute with you in the presence of your lord '.
say: ` verily grace is in the hand of allah.
he endows it with whom he pleases,
and allah is all-embracing, all-knowing'. "

commentary:
 the people of the book had some recommendations to enjoin each
other. their first recommendation was:

" and do not believe save in one who follows your religion. ..."

the divine revelation tells the prophet (p.b.u.h.) that in answer to
them:

"... say: " verily the true guidance is allah's guidance. ..."

that is, the true guidance is not confined to your religion, therefore,
your prejudice is in vain.

their second recommendation was that: never believe:

"... that a person may be given the like of what you have been given;..."

hence, the prophethood must be in the children of israel, not
amongst arab.

"... or they would dispute with you in the presence of your lord '..."

so, you have the best logic and never believe that it be with others.
then, the lord addresses the prophet (p.b.u.h.) thus:

" say: ` verily grace is in the hand of allah, he endows it with whom he
pleases, ..."

and it is not confined to any race or a particular sect.

"... and allah is all-embracing, all-knowing'."

explanations:
 1. in their plots, the enemies of islam recommend to concealment.
they also have no trust to any one other than themselves.

2. the grace of allah is not restricted to a particular group.

3. prejudice is forbidden.