Say (O Muslims), "We believe in Allah and that which has been sent down to us and that which has been sent down to Ibrahim (Abraham), Isma'il (Ishmael), Ishaque (Isaac), Ya'qub (Jacob), and to Al-Asbat [the twelve sons of Ya'qub (Jacob)], and that which has been given to Musa (Moses) and 'Iesa (Jesus), and that which has been given to the Prophets from their Lord. We make no distinction between any of them, and to Him we have submitted (in Islam)."

So if they believe in the like of that which you believe, then they are rightly guided, but if they turn away, then they are only in opposition. So Allah will suffice you against them. And He is the All-Hearer, the All-Knower.