The death of Jesus on the cross and the burial of His dead body are foundational to Christianity. If Jesus did not die on the cross and His dead body were not buried, then Christianity would be untrue (1 Corinthians 15:1-4). Here is a helpful summary of the historical reasons for believing in Jesus’ death on the cross and burial:
The majority of Muslims do not believe Jesus died on the cross and was buried. But given the evidence for Jesus’ death and burial, it is irrational to deny them.