I’ve heard Zev Steinhardt claim that Judaism cannot accept the notion of the Trinity because of the verse that is the foundation of Jewish belief “…the Lord is one.” However, I don’t see how this necessarily invalidates the Trinity. Doesn’t that verse emphasize that monotheism is the True Path™, compared to the polytheism that was prevalent in nearby cultures at the time? I.e. the Lord is the one object of worship, as opposed to a plethora of gods in an inbred pantheon where they bicker amongst themselves. If this is how the verse should be interpreted, which seems likely considering the religious scene in the Middle East three thousand years ago, how then can one say that God doesn’t appear in different roles?
Also, do Jews understand that when Christians talk about the Father, the Son, and the Holy Spirit, they are talking about three aspects of one God?