John 1:1 in the New World Translation says:

In the beginning was the Word, and the Word was with God, and the Word was a god.

John 1:1 nwt

Also in John 1:18 Jesus is again described as a god:

No man has seen God at any time; the only-begotten god who is at the Father’s side is the one who has explained Him.

John 1:18 nwt

Isaiah agrees in his prophecy about Jesus:

For a child has been born to us, A son has been given to us; And the rulership will rest on his shoulder. His name will be called Wonderful Counselor, Mighty God, Eternal Father, Prince of Peace.

Isaiah 9:6 nwt

So according to the Bible, New World Translation, Jesus is most definitely a god.

However let’s have a look in John 17:3

This means everlasting life, their coming to know you, the only true God, and the one whom you sent, Jesus Christ.

John 17:3 nwt

In John 17:3, God (i.e. Jehovah) is named the Only True God.

Now if Jesus is a god, but Jehovah is the only true god. Then it logically follows that Jesus is a false god.

Ask yourself why Jehovah would allow a false god to rule his congregation and kingdom?

Ask yourself if you are truly a monotheist if you actually have two gods, even if one of the is a false god?