it seems to me that you do not understand that your “opponents” are not opposed to the idea of God,
It seems to me that they are opposed to the idea of a God who desires relationship with us, if even exists at all.
I’m not sure what you mean by “opposed to the idea”. I’m opposed to privatizing social security, and I’m opposed to mandating prayer in schools. By contrast, I don’t believe in God, but that doesn’t mean that I am “opposed” to there being a God. If there is, great! What I oppose is passing laws based on the assumption that there is a God, especially some alleged particular God.
As far as whether he desires a relationship with us, that would be awesome. But it seems to me that if he does exist, he isn’t making that desire clear at all. It seems more like a claim made by some people.