The hypothetical question was asked in 1119. If you believe in God, why would you not think it "a good thing" for others to believe in that God?
I'm not talking about coercion here. SeaLion said it would be "dreadful" if other countries believed in her God.
Do you think it would be "dreadful" if everyone believed in your God (assuming you believe in God)?
If God chose to make Himself perfectly clear to everyone, then it would make sense if we all believed the same thing and we would know what was expected at all times. That clearly has not happened yet in history. I don't really expect it. Mostly, I don't see how anyone thinks they know things that involve "spiritual matters." (That is, matters which cannot be determined from investigation of the material world.)
I don't believe in God (I know He exists). However, we're not talking about whether it's a good thing for others to believe in Him. The problem lies in that every believer in God has his or her own interpretation of what God wants. I do not trust others' interpretations of God's desires any more than I suspect they trust mine. We're still dealing with people, not God.
Do you think it would be "dreadful" if everyone believed in your God (assuming you believe in God)?
Yes, because any concept I might have of God would be imperfect and flawed.