This is an absolute solid case. At least 250 eyewitnesses are available. Whether you believe the meaning of the Crucifixion or not, the historical evidence for the event of the Crucifixion and the Resurrection is rock solid. And he thinks, no explanation necessary. You just believe.
Historical fact is the basis of Christian faith.
My impression is that Islam goes the other way around. History is defined to be what the 'sacred texts' say, no matter what the factual evidence says. No doubt, the central message of the first followers of Christ was his crucifixion and resurrection. God has so far always given evidence enough to show the authentication of his messages. This is the hallmark of all Biblical revelation.