Complex sentence: It was an Oriental product, anti-Jewish and un-Hellenic... Other discussions of Christian Gnosticism have included pre-Christian religious beliefs and spiritual practices argued to be common to early Christianity, Hellenistic Judaism, Greco-Roman mystery religions, Zoroastrianism (especially Zurvanism), and Neoplatonism.
Split into simpler sentences: It was an Oriental product, anti-Jewish and un-Hellenic... Some scholars have claimed that gnosticism pre-dated Christianity. Such discussions have included pre-Christian religious beliefs and spiritual practices argued to be common to early Christianity, Hellenistic Judaism, Greco-Roman mystery religions, Zoroastrianism (especially Zurvanism), and Neoplatonism.