kxmode, I am not a Hebrew scholar. However, yes, repeating the Tetragrammaton is forbidden among Orthodox Jews.
Of course, Orthodox Jews represent only a tiny fraction of all Jews worldwide. It is the second smallest major Jewish movement in the U.S. (smaller than Reform and Conservative and larger than Reconstructionist).
Like most American Jews, I was raised in an essentially non-practicing Jewish home, so the issue was never relevant to me. I then became a member of the Baháʾí Faith in 1970.
Since I have never been a Christian, whether one or another church is trustworthy is, to me, not important. In addition to loving Moses and Jesus, I love Muḥammad, my dear Baháʾuʾlláh, and all the other Messengers of God.
As I mentioned before, some people have made the theological (not necessarily historical) argument that the word, Yāhweh, itself was originally intended to mimic the breath. Although I find that idea personally appealing, I have no way of knowing whether it is valid.