Which is weird. They believe he existed, they believe he was sacrificed on the cross and they believe he is currently ruling the heavenly kingdom. And allegedly they got all this from the same Bible as everyone else.
From JW.ORG:
We believe in Jesus, who said: “I am the way and the truth and the life. No one comes to the Father except through me.” (John 14:6) We have faith that Jesus came to earth from heaven and gave his perfect human life as a ransom sacrifice. (Matthew 20:28) His death and resurrection make it possible for those exercising faith in him to gain everlasting life. (John 3:16) We also believe that Jesus is now ruling as King of God’s heavenly Kingdom, which will soon bring peace to the entire earth. (Revelation 11:15) However, we take Jesus at his word when he said: “The Father is greater than I am.” (John 14:28) So we do not worship Jesus, as we do not believe that he is Almighty God.
Put simplisticly, it's a church of the works. You must earn your way into Heaven, which also has a limited seating capacity (140k if I'm not mistaken).
Christians, by my definition at least, do not believe it is possible for one to "earn" salvation. You can attain it through your faith in Jesus but you cannot earn it.