There are many gods, which is why The One True and Living God distinguish Himself from all those that are not really gods at all. The objecting question is not a good one and the proofs are even worse; for example, Exodus 12:23 is sometimes referenced as proof there are many gods. The context of the passage clearly shows the Lord God doing two acts, not two gods working two acts.
Another proof used in this objection is 1 John 5:7 (KJV), which reads, “For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.” The proof used by the objector answers against the objector. There is only one God.
The first command is that we love God with all heart, mind, soul and strength. This means our love and devotion is undivided. Other things that compromise that love are gods of our own understanding, and this is offensive to the true and living God. This is why God warns repeatedly that men turn from false gods (things that are not really gods at all and steal His love) and cry for mercy to the true and living God.