How many gods are there?
The estimate for the number of gods that exist can be any number from none if you are an atheist to the same number as there are people in the world if you believe that each person has a slightly different opinion of exactly what God is. Of course, a very popular estimate is that there is one God, a belief common to the religions derived from Judaism, Christianity, and Islam. Even here the water is slightly confusing when you hear some of the explanations as to why the Christian Trinity consisting of the father, the Son and the Holy Ghost is not three gods but one God. There are other variations that are also possible. Current estimates are that there are about 32,000 Christian religions at the present time, each one of which believes the others to be wrong.
There are also the ancient gods to consider. If the ancient Egyptian God, Ra, the god of the sun was really a god did he cease to exist just because people stopped worshiping him? If not we have a long list of Egyptian gods including Hathor, goddess of love, Ptah, God of creation, Isis, goddess of magic, marriage, healing and protection, Horus, God of war, and many many others. The Greek gods are also many, the best-known of which are Aphrodite goddess of love, Apollo God of light, Athena goddess of wisdom Hades King of the underworld, Poseidon God of the sea, and Zeus, King of the gods and ruler of Mount Olympus.
The list of Eastern religion's gods include Pangu the first living being and creator of all things on Earth and Nu Gua the goddess who was supposed to have created man. This list could fill up the page alone.
I think you get the idea. I'm not even going to attempt to list the gods of the Aztecs and the Incas and the North American Indian tribes. I didn't forget the Norse gods or the gods of various tribes of Africa, South America, and Australia.
My point is that at one time there were people who had exactly the same faith and belief in those gods that you now have in your god. It's obvious that some of the faithful had faith in false gods. If you are correct then all these other faithful believers were wrong. On the other hand if the ancient Norse god Thor, the son of Odin was the true God then you and I are both wrong.