As-salam aleikum wa rahmatullahi wa barakeuh,
In regards to the alleged crucifixion of Jesus (pbuh), it is true that there is no hadith coming directly from Prophet Mohammed (pbuh) telling about this event, but there is one hadith from Ibn Abbas of which isnad is sahih, and from what I have remarked, his narration contains some specific detail confirmed by an authentic saying of Prophet Mohammed (pbuh), namely Ibn Abbas says that before Romans went to arrest Jesus (pbuh), he entered to the room in which were waiting his disciples, and it is said that his hair were flowing with water, and this is interesting because in an authentic hadith related by Sahih Bikhari and Muslim, when Prophet Mohammed met Jesus in heaven (in Isra wa al-Miraj) he described him by saying that his hair dripping water, i.e. that he had wet hair, and it clearly confirms the particular detail related by Ibn Abbas, so his whole narration that he was raised when he was in that room could be true. And by the way there is another authentic hadith from Prophet Mohammed (pbuh) that Jesus (pbuh) will descend from heaven by laying his hands on the wings of two angels, so how author from the website linked above can claim that Jesus (pbuh) already died in earth ?