Any Jew would smile to hear a Christian, much less a Mormon, tell him: “I also worship the One God.”
One means ONE. Check the FIRST commandments. Not three-in-one, not one as represented by a statue or a symbol, not one in gold with horns under Sinai, not a new one in New York with golden notebooks. ONE.
He is jealous, and no, you can’t see Him. Or make images of Him. Or make Him more personable. Or make yourself a pocket-version, or a more “tangible” version, come to earth, or an number of “intermediaries.” ONE means ONE.
Isaiah 48:12 Hearken unto me, O Jacob and Israel, my called; I am he; I am the first, I also am the last. 13 Mine hand also hath laid the foundation of the earth, and my right hand hath spanned the heavens: when I call unto them, they stand up together. 14 All ye, assemble yourselves, and hear; which among them hath declared these things? The LORD hath loved him: he will do his pleasure on Babylon, and his arm shall be on the Chaldeans. 15 I, even I, have spoken; yea, I have called him: I have brought him, and he shall make his way prosperous. 16 Come ye near unto me, hear ye this; I have not spoken in secret from the beginning; from the time that it was, there am I: and now the Lord GOD, and his Spirit, hath sent me.
God goes to great lengths in these passages to make it clear that He is speaking firsthand. God is the speaker and yet the speaker has been sent forth by God and His Spirit. It is a great mystery... but your beef is with Him... we simply take Him at His Word.