Complex sentence: According to Chwolsohn (1856), they appear to have gravitated around the original pro-Jewish "Hanputa" or Elcesaites out of which the prophet Mani seceded and are identified therefore as the pro-Torah "Sampsaeans" but also less accurately with the anti-Torah Mandaeans.
Split into simpler sentences: According to Chwolsohn (1856), they appear to have gravitated around the original pro-Jewish "Hanputa" or Elcesaites, from which the prophet Mani seceded. Therefore they are identified as the pro-Torah "Sampsaeans" but also, less accurately, as the anti-Torah Mandaeans.