I do not agree to the opinion that either the US fundamentalist God exists, or no God exists. As only few people still believe in the US fundamentalist God, this would exclude almost all other Gods from existence.

Christianity is split into 4 main churches and about 34,000 sects or free churches. US fundamentalism is just one (or in fact, some) of them. All 34,000 believe in more or less different versions of God. For instance, most of them do not believe that God created the earth in 6 days, or that God killed more than 2 million people as described in the Old Testament. Most Christians in my country would consider it a blasphemy to take the bible literally and believe that God is a killer.

They rather believe that those bible stories are to be interpreted in their context, as a sort of historical war propaganda, and not as literal descriptions of God's acts. The killings described in the bible didn't really happen in that extent. Nations allegedly completely wiped out by God or God's accomplices just reappear in one of the next bible stories. Sometimes God had to wipe them out several times before He finally accomplished a successful holocaust. This does not sound like a true story.

So if you talk about God you need to define which God you mean. Only some of those Gods appear to be criminals who can be put on trial for their killings.