In the 1970’s a contemporary Christian band called Daniel Amos recorded a song entitled “Jesus is Jehovah to Me.” 

I can tell you're a sincere man, And I'm tryin' my best to understand

But your words are confusin', it seems you're abusin' God's Word that's there in your hand

Now a Christian you say you are, But that's stretchin' the Truth much too far

'Cause in Christ I doubt you believe, And Jesus is Jehovah to me

Jesus is Jehovah to me,

He’s Lord and He's King of Kings

Almighty God is He

Jesus is Jehovah to me.

Now we both have said that the Lord's comin' back, And you've more than once stated that fact

Now it seems rather odd, if you're prophets of God, Your dates have been so far off the track.

Now the Watchtower can only deceive, But from Jesus you can receive

God's Spirit comes in, and you're born again, Singin' Jesus is Jehovah to me.

Jesus is Jehovah to me

He's Lord and He's King of Kings

He's more than a man, He's the great I AM

Jesus is Jehovah to me.

If you're really "Awake," you'll make no mistake

Jesus is Jehovah to me.

[Jesus is Jehovah To Me, (c)1976 Chamberlain, Dieckmeyer, Taylor, Maranatha! Music, from the self-titled album Daniel Amos]

The promised Messiah had to be God himself to fulfill prophecy and complete the task of redeeming mankind.  The repeated claim "Son of God" doesn't mean Jesus was claiming to be a descendant of God the Father, but that he had the same essence as God the Father.  

Admittedly, there came many claiming to be Christian while denying this identity of Jesus, and it took years before beliefs were solidified in creeds—probably the most important being the Nicene Creed formulated 325 AD. 

This identity of Jesus as the same nature as the Father has been a basic tenant of Christianity since the Church began on the day of Pentecost.  Admittedly, the early church struggled with this concept of the relationship between Jesus' human nature and his divine nature for period of time, and some professing Christians denied Jesus' divine nature.  The triune nature of the Godhead was solidified in the Nicene Creed in 325 A.D.  The Chalcedonian Creed of 451 AD formulated the identity dilemma as Christ having complete human nature and complete divine nature “united in one Person without moral complication.”  Protestant reformers kept pretty much to the same idea—Jesus being both completely God and completely man, sinless, and perfect.

The real difference between true Christianity and all the other religions and philosophies boils down to what they think of Jesus Christ.

The Watchtower "Jesus" is believed to be Michael the Archangel, the greatest and first creation of Jehovah—but still, only a created being.  Spiritist’s "Jesus" is an advanced medium of the sixth sphere.  Unitarians believe "Jesus" was a very nice guy whose followers got a little carried away after his death.  The Unification church’s Jesus died tragically in a comedy of errors only to return to earth in the 1920’s as a Korean millionaire.  The Mormon "Jesus" was born of sexual intercourse between Adam-God and Mary and although he started out as just another one of God's physical descendents (hey, aren't we all?) worked his way up to eventually becoming a god. 

The point is that all these various religious groups SAY they believe in "Jesus"; however, each one redefines the "Jesus" they believe in to suit their own religious preferences.  The only similarity among these religions is their total agreement on rejection of Christ’s divinity, and their rejection of exclusive Biblical authority to identify who the real Jesus is! 

Let's personalize this.  If the "Jesus" you are entrusting your eternal salvation to is not the Jesus who is eternal God in the flesh as revealed by the Bible, then your "Jesus" won't be able to save you no matter how holy you feel, how many good deeds you do, how nice you are, or how sincerely you believe it!

C.S. Lewis tells us Jesus has left us with a riddle:  Either Jesus was a madman who (wrongfully) believed himself to be God and somehow duped his followers into believing it too, or he was an intentional deceiver willing to die to perpetrate his lie on the rest of us.  Or, he was really God in human form—“God with us”—as Isaiah the prophet wrote [Matthew 1:22; Isaiah 7:14].  Jesus didn’t leave any middle ground about being some nice guy, an angel, or merely a great teacher.  Either he was Jehovah God, or he doesn’t deserve your time or respect.  And most importantly, any savior who isn't God won't be able to save you.