if they believe in the same as you have believed in then they have been guided. but if they turn away then they are in schism. god will protect you against them for he is the hearer the knower.
فإن آمنوا بمثل ما آمنتم به فقد اهتدوا وإن تولوا فإنما هم في شقاق فسيكفيكهم الله وهو السميع العليم