Actually, I think the Gospel will take care of itself just fine, whether it comes through a MAD person or otherwise. I don't think the subtleties of what MADs are about will register and I don't think anyone reading Acts or Peter's letters will end up with the idea that there was a fatal, destructive rift between the guys.
If they read merely Acts 2, 3 and then 13, they would actually find them on the exact same page even about Israel vs nations, but again, I don't think attention to detail about Israel is what will be absorbed on the first trip through the basic principles of the Gospel. They will see what needs to be believed upon to be saved--the accomplishment of Christ in his life, death and resurrection.