A common argument for the historicity and factuality of the bodily, physical resurrection of Jesus from the dead is the origin of the apostles' faith. Peter and the rest were weak in faith and overcome by doubt and fear when Christ was nailed to the Cross and couldn't even bring themselves to witness His death agony or to lend Him support as He died. Nor could Peter answer (three times!) honestly when asked whether he knew Jesus. James the brother of Jesus was a skeptic, convinced of the resurrection and the Lordship of Christ by seeing Jesus after He'd risen from the dead. Yet these weak and unbelieving people eventually became fierce advocates of the Lordship of Christ, all suffered hardship for their faith, and most died martyrs for their faith.
The skeptical response almost never varies: Almost every faith, cause, and creed boasts martyrs and committed followers. The fact that Mohammed Atta and the other Sept 11 mass murderers were willing to fly airplanes into buildings isn't evidence for the truth of Wahhabi Islam, is it?
The difference between the original witnesses to the risen Christ and any other martyrs of any other creed that one can bring up is fundamental and striking in its power. An Islamic jihadist suicide bomber straps on his bomb vest on his way to blow up schoolchildren b/c he thinks what he is doing is sanctioned by his god. He believes it is right and has his whole life experience and pious history to "prove" its truth to him. He believes that he is walking in the truth.
The original witnesses to the risen Christ suffered and died b/c they would not deny that what they had seen and touched (2 Peter 1:16, 1 John 1). In the face of opposition - simply confess Kaiser Kurios and you can go free - they would refuse and confess Kristo Kurios. I have seen and touched this man Who was dead but then rose to life again.
What's the difference? They were in a position to know that Christ had not in fact risen, if in fact the resurrection were a lie. Who would be willing to suffer terribly, lose everything, and die a horrible death for something they knew was a lie? Will hundreds of people do this, for something they knew was untrue?
The jihadist could not know with certainty that Allah is not God. He believes (with all his heart, I don't doubt) that Allah is God and he will get his virgins if he blows up a school bus for Allah. The original disciples of Jesus could know with certainty that Christ had not risen, b/c they would know they'd been making the story up the whole time. The situations are not analogous. The quality of the original Christian martyrs is singular in its purity of devotion to truth and to Christ and forms a powerful rebuttal to those who doubt the truth of Christ's resurrection.