Dear Dominik, When you suggest taking dviṣaṁ dviṣam as an iterated gerund with -am, I suppose you mean the type accounted for by Pāṇini's ābhīkṣṇye ṇamul ca (3.4.22). However, this would then be dveṣaṁ dveṣam, like bhojaṁ bhojam. I suggest that the phrase in your text has iteration as accounted for by nityavīpsayoḥ and means 'every single one who hates them'. Regards, George