Don

FWIIW, there is a difference between Arius, who can be considered the first arian, and arians in general. Some of the (general) arian arguments look very similar to the arguments of those who hold to the eternal subordination of the Son.

The Jewish Shema (Hear O Israel, YHWH is one….) at the most presents God as a unified plurality, so as one makes some possible differences, the unified plurality can no longer be the case and it becomes tri-theism or something that is not monotheism.