According to chapter 4 of the Qur'an Jesus was not killed or crucified as follows:
Qur'an 4:157 And for their saying, "Indeed, we killed the Messiah, Isa, son (of) Maryam, (the) Messenger (of) Allah." And not they killed him and not they crucified him but it was made to appear (so) to them. And indeed, those who differ in it (are) surely in doubt about it. Not for them about it [of] (any) knowledge except (the) following (of) assumption. And not they killed him, certainly.
(Translation - Word for Word: Dr. Shehnaz Shaikh, Ms. Kauser Katri, and more)
Firstly according to verse 157 the Jews were boosting about killing Jesus by crucifixion, then Allah claims they did not kill him or crucify Jesus.
Secondly it was made to appear to the Jews that Jesus was killed and crucified.
Thirdly the Qur'an claims those differing over the death and crucifixion of Jesus are in doubt, have no knowledge of the event, and are following assumptions.
Fifthly the Qur'an clarifies the Jews did not kill Jesus.
Question:
Who is differing over the death and crucifixion of Jesus, who is in doubt, and who is making assumptions over the event?