a) The International Court of Justice settles legal disputes between states, not between states and individuals.
b) The modern States of Israel and Italy did not exist 2,000 years ago.
c) A document written by the friends and followers of the alleged victim can hardly count as unbiased evidence of the unlawfulness of the conviction. There are no reliable records of that execution taking place, anyway.
d)
If one ignores all the obvious problems with the case, it actually gets tried, and the Bible is accepted as evidence, then one must also consider that the Bible claims Jesus is still alive in Heaven and could appear on Earth if he so desired. Could the court call Jesus to testify? After all, he's the victim, and of all the parties involved in the incident, he is allegedly the only one still alive. Surely his testimony would be invaluable.
But if Jesus hadn't been killed, then the whole cornerstone of Christianity could never have happened.
That's right. Christians should be thanking us.
I've actually heard people claim that the Crucifixion was God's "Plan B" and that Jesus was actually supposed to live forever, eventually taking over the world. Hence, anti-semitism.
That's even worse than the standard version. As I never tire of reminding fundies, God is supposed to be omnipotent. What kind of self-respecting omnipotent being has his plan thwarted by a bunch of silly humans?
Besides, it's quite clear in the Bible that Jesus knew Judas would betray him. If he actually didn't want to get crucified, he probably would've taken some preventative measures, like not hanging out with him anymore.