And say not of those who are slain in the way of Allah: “They are dead.” Nay, they are living, though ye perceive (it) not. Surah 2:154

Think not of those who are slain in Allah’s way as dead. Nay, they live, finding their sustenance in the presence of their Lord; They rejoice in the bounty provided by Allah: And with regard to those left behind, who have not yet joined them (in their bliss), the (Martyrs) glory in the fact that on them is no fear, nor have they (cause to) grieve. They glory in the Grace and the bounty from Allah, and in the fact that Allah suffereth not the reward of the Faithful to be lost (in the least). Surah 3:169-171

Therefore let those fight in the way of Allah, who sell this world’s life for the hereafter; and whoever fights in the way of Allah, then be he slain or be he victorious, We shall grant him a mighty reward. Surah 4:74

Not equal are those believers who sit (at home) and receive no hurt, and those who strive and fight in the cause of Allah with their goods and their persons. Allah hath granted a grade higher to those who strive and fight with their goods and persons than to those who sit (at home). Unto all (in Faith) Hath Allah promised good: But those who strive and fight Hath He distinguished above those who sit (at home) by a special reward. . . Surah 4:95

A jihad is a holy war, declared by a prophet or iman (teacher). If the war is called holy, then anyone who fights and dies will immediately go to paradise, without their sins being weighed on the scales. They get a free pass to eternal delights with the delightful companions.

The Koran says that are slain in the way of Allah (die fighting for his cause) are not dead. Those martyrs are experiencing glory. This is a powerful recruitment tool.

The Koran says warfare and fighting are obligatory.

Fighting is prescribed for you, and ye dislike it. But it is possible that ye dislike a thing which is good for you, and that ye love a thing which is bad for you. But Allah knoweth, and ye know not. Surah 2:216

The Koran states that if someone dies in a battle for God, that they immediately receive heaven as a reward.

The Bible tells a different story of martyrdom. The Roman guards, led by the betrayer Judas, arrived to martyr Jesus for the proclamations he made.

While he was still speaking a crowd came up, and the man who was called Judas, one of the Twelve, was leading them. He approached Jesus to kiss him, but Jesus asked him, “Judas, are you betraying the Son of Man with a kiss?” When Jesus’ followers saw what was going to happen, they said, “Lord, should we strike with our swords?” And one of them struck the servant of the high priest, cutting off his right ear. But Jesus answered, “No more of this!” And he touched the man’s ear and healed him. Luke 22:47-51

Peter resorted to violent payback and was willing to die for his faith. Jesus rebuked him. Even Jesus did not fight back at the people coming to kill him. He healed the hurt man instead, refusing any more bloodshed.

When nailed to the cross, Jesus, who showed the ability to command great miracles, allowed the martyrdom to occur instead of miraculously calling an army to angels to Jihad for him.

When they came to the place called the Skull, there they crucified him, along with the criminals—one on his right, the other on his left. Jesus said, “Father, forgive them, for they do not know what they are doing.” And they divided up his clothes by casting lots.
The people stood watching, and the rulers even sneered at him. They said, “He saved others; let him save himself if he is the Christ of God, the Chosen One.” Luke 23:33-35

Instead of fighting back, Jesus chose to forgive.

One of the criminals who hung there hurled insults at him: “Aren’t you the Christ? Save yourself and us!” But the other criminal rebuked him. “Don’t you fear God,” he said, “since you are under the same sentence? We are punished justly, for we are getting what our deeds deserve. But this man has done nothing wrong.” Then he said, “Jesus, remember me when you come into your kingdom.”
Jesus answered him, “I tell you the truth, today you will be with me in paradise.” Luke 23:39-43

From the cross, we see that the one who lashed out in anger, cursing, insulting and seeking revenge, did not receive the promise of paradise. It was the one who defended Christ and recognized him as God. He understood Jesus’ innocence and asked to be with Christ in paradise. Jesus comforted him with words of eternity and not with commands for violence.