What is God in Tantra?

Perhaps one of the reasons all the various religions in the world are fighting and killing each other is because they never took the time to clarify to one another what, precisely, they meant by the term "God"? Often when atheists criticize religion, they only conceive of God along Abrahamic lines, and poorly at that. But the Abrahamic notions of God (while also being more diverse than many realize), are but a small part of the discourse. In India, during the course of our 9000 year (o...