[blasater1960]

"The Apostles were the first “Jews for Jesus”."

And the last.

[RobRoy]

“Jewish” is both a race and a faith. I think of “Jews” for Jesus as one of two things:

1. The equivalent of “blacks for Jesus”.

2. The equivalent of “ex-mormons for Jesus”.

That is, they are either highlighting their race or their former faith.