I don't want to believe in a God who cares more about me than about anyone else in the world. I don't want to believe in a God who favors me in some way, one who helps the New England Patriots in the Super Bowl, one who helps Americans kill bystanders in Afghanistan. I don't want to believe in a God that values Israelis over Palestinians, or vice versa.
That's where my basic attitude of "God exists, but must not interfere" comes from, I think.