There were other Christ's, but Jesus is the main one. To explain him, from a Christian perspective, would be that He came here and accomplished what he meant to do. He died for Our sins.

I can try to explain him, but I don't care if it's shot down. What other explanations are needed? He'd still be dead, now, if they hadn't have crucified him. Or is he still dead now? Has he quietly lived among us through generations? So he rose from the grave. Where is he? Did He die eventually? I don't even care if these questions are debated at all.