I just wonder how Jews and Muslims explain the “us” in the genesis:
Then God said, “Let us make mankind in our image…
They generally say that the plural “we” is frequently used to emphasize divinity in Semitic languages.
While it is an interesting linguistic nuance, by itself it doesn’t prove the Trinity. Other passages throughout the Old Testament appear in retrospect to support the concept of the Trinity, such as the physical appearances of God to Abraham. In one example, YHWH is speaking with Abraham about the coming destruction of Sodom and Gamorrah, when YHWH rained fire on Sodom and Gamorrah from YHWH out of heaven. The appearances of the Angel of the Lord and the Spirit of the Lord in the Old Testament in various places may support this as well. However, the Trinity is not explicitly revealed until the coming of Christ and the outpouring of the Holy Spirit in the New Testament.