Do Christians lack conceptual understanding of idolatry?

If you think Jesus is alive, you must think he is immortal.

If you think Jesus is immortal, you think he is divine.

If you think Jesus is divine, you are by definition guilty of idolatry - a mortal sin.

Christians are required to worship Jesus as the co-equal of the God of Israel who is also Allah.  

Is the reason why they are unable to grasp the idolatry of Christianity because they are unable to grasp the enormity of the lie perpetrated on them for the best part of 2000 years?

If Christianity is kaput, must it be replaced?

If Christianity must be replaced, must it be replaced by Islam?

If it is felt Christianity should not be replaced by Islam, what should it be replaced by?