had god willed he could have made them one community but he admits into his mercy whomever he wills. as for the wrongdoers they will have no protector and no savior.
ولو شاء الله لجعلهم أمة واحدة ولكن يدخل من يشاء في رحمته والظالمون ما لهم من ولي ولا نصير