My understanding of the reason many Jews do not use "God" is not what you say but because they want to avoid idolatry. I once asked and got that answer. The individual in question also did that with "Jesus" and "Allah," but not with "Buddha," because, I was told, the Buddha is not ever worshiped (I don't think the guy had ever been to Sri Lanka).

Of course, "Buddha" is not a name, but only a title: come to think of it the same thing applies to "Allah" and "God."