Every trinity scholar on the planet knows 100% the God Israel taught, served and worshipped up until this very day is the Abrahamic God = a single being God YHWH(Jehovah)--When Jesus attended the Israelite places of worship was taught that God so was every bible writer.
Back in the 3rd century, the Greeks were refusing to go to a religion with a single God, they were serving a hundred gods. So satan through his religion( 2Cor 11:12-15) claiming to be christian, created a trinity god at the council of Constantinople in 381 ce. No trinity was taught or served at the council of Nicea in 325ce.