Someone said: All it takes is your belief that he died on the cross for our sins.
Response: Don’t put too much stock in that.
The historical Jesus didn’t die for that reason. Jesus died because he staged a Palm Sunday event which he thought God would enhance into kicking off the Kingdom of God ruled by the Son of Man. There are indications in the New Testament that Jesus would be that Son of Man.
Caiaphas and other members of the Temple establishment saw this as a threat and idolatry. In the Talmud (Babylonian Talmud) Jesus is charged with leading the country into idolatry. Jesus was a healer and people were being healed in his name. This is part of the idolatry. Why wasn’t it sufficient that healing be done by mentioning, uttering, saying “The Lord God is my healer” instead of saying in the name of Jesus.
When there is grumbling in the New Testament against Jesus, that opposition is significant.
Furthermore, Jesus complained about the Temple and his actions foreshadowed a Post-Temple Judaism. The Temple establishment won a short term victory by having Jesus eliminated but the Age of Pisces did not need a temple where people had to buy birds and lambs (Age of Aries) as sacrifices for sins.
Although Christopher Hitchens spoke greatly for personal responsibility, having no one bear the sins of others, it is possible that the end of the Age of Aries and the marker for the end of Temple Judaism did require the death of Jesus and the martyrdom of Stephen–and the death of James, brother of Jesus.