So if we leave the word "puzzled" out and just stick to the facts.
Christianity came before Islam, but while Islam accepts some teachings of Jesus, it ignores crucifixion, claiming it never happened, but without any justification for doing so.
Here is justification, which if you had read and understood the Quran with a open heart and mind, you would have understood.
Having explained so many general principles on the subject of life and death, it was not necessary that the Holy Quran should speak specifically of the death of Jesus. Nevertheless, Almighty God has particularly mentioned Jesus’ death in the Quran. When the Jews succeeded in their plans to have Jesus sentenced to crucifixion, he prayed to God to be delivered from this fate, and was answered by Him thus :
"O Jesus, I will cause you to die, and exalt you to My presence, and clear you of those who disbelieve and make those who follow you above those who disbelieve till the day of Judgment." (3:54)
Here God made with Jesus four promises:
"Cause you to die" (tawaffa), i.e., Jesus would not be killed by the Jews, but would die a natural death.
"Exalt you in My presence" (raf‘a), i.e., he would not be crucified, which the Jews sought to do to prove him accursed, but rather he would receive Divine nearness. In fact, raf‘a is the opposite of wad‘a, the latter meaning disgrace and the former meaning honouring.
"Clear you of those who disbelieve" (tathir), i.e., he would be cleared of the Jews’ allegations against him, as he was by the Holy Prophet Muhammad.
"Make those who follow you above those who disbelieve till the day of Judgement", i.e. his followers would forever have the upper hand over his rejectors.
The above verse proves that Jesus has died, for raf‘a (exaltation to God’s presence) is attained only after death when all the material veils have been removed. Every righteous person is granted raf‘a to God after his death. The Holy Prophet has said:
"When a believer nears death, angels come to him. So if he is righteous, they say: ‘O pure soul! leave, you were in a pure body’ … So that pure soul comes out, then they take it to the heavens and its gates are opened for it." (Mishkat).
Hence, whenever a righteous individual dies, the angels take his soul up to heaven. The very same happened in Jesus’ case, so that after his death it was his soul that was raised to heaven, and he joined the ranks of the righteous among the dead.
Thus God fulfilled all the above promises in order: He rescued Jesus from the hands of the Jews, and eventually granted him a natural death; after his death, God honoured his soul with Divine nearness; He cleared him of the Jews’ allegations against him through the Holy Prophet Muhammad (may peace and the blessings of Allah be upon him) and He gave Jesus’ followers the upper hand over his rejectors