First of all, yes, I meant Jesus Christ. As Muslims we believe in him as a great Prophet of God, and we are ordered to love and respect him.
If any Muslim were to mock Prophet Jesus, he would become an infidel, non-Muslim.
As Muslims, we believe that Jesus was the fourth best of ALL the Creations of God. The order is, Prophet Muhammad, Prophet Abraham, Prophet Moses, Prophet Jesus, and then Prophet Noah, in that order.
To answer the second question, as Muslims we do believe that the Christian who HEARD the message of Islam and then died without embracing it, would end up with an eternal punishment -
HOWEVER, notice that the Christian who did NOT ever hear about the message of Islam, would not go for eternity to Hell.
And the message of Islam is, that there is none worthy of worship except God, and that Muhammad is the Messenger and Prophet of God.
Whoever heard this much is obliged to accept it and what it entails.