Should I query my four year old knowing the details of the crucifixion?

[virgil]

This is maybe an aibu but my four year old has just told me how Jesus was forced to carry a heavy cross for miles until he was completely exhausted and then he had nails hammered through his hands and was hung by them in the sun until his hands ripped and he died. Last night the discussion was about whether bob the builder has lots of different pairs of dungarees that look the same or whether he wears the same ones every day.

Am I being over sensitive about this? I feel it's completely inappropriate detail for a four year old to know. Apparently he watched a video about it - twice. We are not religious but that's not the point. I have no problem
With him being told that Christians believe that Jesus died and then came back and that's why we celebrate Easter. I do have a problem
With him being told (and shown) unnecessary gory detail.

I'm thinking of going into school and asking to see what they've been shown. Is this an overreaction?

I went into school and have now see the video. It's hardly an 18 certificate but definitely a bit much for a four year old. Clear nails through hands, big close up of the hammer being raised up into the air (although it didnt actually show the nails going in) and the whole crown of thorns cutting his head and lots of emphasis on the great pain and suffering. No hand ripping so that bit must have been him thinking through the whole thing after the event and imagining what would happen The teacher was fantastic and reassured me that they hadn't appreciated that it would upset the children, that they wouldn't use it again and that they had explained very clearly that it is not "fact" but is a story that some people believe. Feel better for having gone in even though I will now undoubtedly be labelled as a nightmare parent

It's just so unnecessary. What is the point of showing murder and torture scenes to four year olds?

Well done for bringing it up with the school OP - good that they reacted so positively.