Christ is God but the Jehovah's Witnesses don't believe this. Jesus is God. They believe he is God's first created creature. They deny Christ's deity.
The Bible teaches this. Christ is divine, a part of the Trinity, God himself.
In the beginning was the Word, and the Word was with God, and the Word was God.
15 The Son is the image of the invisible God, the firstborn over all creation.16 For in him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things have been created through him and for him.17 He is before all things, and in him all things hold together.18 And he is the head of the body, the church; he is the beginning and the firstborn from among the dead, so that in everything he might have the supremacy.19 For God was pleased to have all his fullness dwell in him,
For in Christ all the fullness of the Deity lives in bodily form,
1 John 5:7-8
7 For there are three that testify:8 the Spirit, the water and the blood; and the three are in agreement.