it is not your responsibility to make them follow the right path god guides whomever he pleases. whatever wealth you spend is to your own benefit provided that you spend only to seek the favour of god. whatever wealth you spend shall be repaid to you in full and you shall not be wronged.
ليس عليك هداهم ولكن الله يهدي من يشاء وما تنفقوا من خير فلأنفسكم وما تنفقون إلا ابتغاء وجه الله وما تنفقوا من خير يوف إليكم وأنتم لا تظلمون