to be an adversary means to work against someone , and that is just what satan does , he works against God and against Gods puropse for the earth. so any one who is on Gods side , will get agro from Satan ,because they are on Gods side and satan does not like it when people are on Gods side, and satan also knows that he has only got a short period of time left befor he is put away for a 1000 years, and then Gods heavenly kingdom goverment can rule with out any influence of satan around Daniel 2;44 the whole world is lying in the power of the wicked one (satan the devil) at the momment , ( 1 john 5;19 ) but not for much longer because when the wicked one satan is not around ,great things will be accomplished . those who uphold God and his purpose for the earth , are at the momment satans target, and he will do everything in his power to stop people being on Gods side. but no worries Gods people are upholding interity to God ,and then Jehovah God can make a reply to Satan proverbs 27;11
Be wise, my son, and make my(Jehovahs) heart rejoice, that I (Jehovah)may make a reply to him (satan)that is taunting me....................... satan taunts God , but when we do what is right in Gods eyes it is a slap in the face to satan.