In the West, there is really only one God for most people, whether you you think he is real or non existent, and that is the God of the Abrahamic religions (Judaism, Christianity, Islam). Most westerners either don't believe in any God, or they believe in the God of the Judeo-Christisn-Islam tradition. Most athiest in the west don't bother attacking the reality Krishna, or Shiva, Kali, etc. The Judeo-Christisngod is the god Nietsche meant. It was a given in the West the other gods didn't exist - hiathiest/agnostics didn't believe in any god, and those who did believe in a good just believed in the God of the Bible and Koran.