Both Tacitus - a well-respected historian - and Josephus, attested to the reality of the Crucifixion. There are other references. Some people post in the most abject ignorance!
Tacitus attested to the reality of Christians, suggesting people who beleived the crucifixion but not saying very much about the crucifixion itself.
Josephus' personal history is one of self-service rather than impartial adherence to truth. Josephus birth was after the purported death of Jesus, so again his commentary is at best 2nd hand and attests to early Christianity rather than to anything actually about Christ.
To return to the original post for a moment, I don't think anybody questions that crucifixion is a brutal, horrendous way to die, and we feel for anyone that was put through it as much as we can from our purely academic understanding of the experience. People don't doubt that crucifixions happened, and it's entirely reasonable to suppose that the figure the idea of Jesus is based upon may well have been crucified, may even have believe that he was the son of God, or the incarnation of God and was doing it for mankind as a whole.
What we question isn't whether crucifixion happened, but whether there's a god that created an avatar in the first place.
O.