Welcome Alice. Delightful introduction . . .you handled the situation with your son well.
My middle son has been told he would burn in hell as well. Since he is 15 and already a staunch atheist he just laughed about it. The kid told him that after God came and took all the good believers up to heaven, everyone else would be left behind in lawless chaos. There will be no police and you will have to rush to get as many guns as you can to kill people before they kill you. My son had a very good laugh.
Thanks for your replies :)
It is a concern when children are told such things, and it's clear that with this child speaking to your son Dejah, that he was quite disturbed by the notion. One thing that concerned me with this friend of my son's was that I wondered if he too might be scared about burning in hell. As it wasn't long after that, due to another friend also being an atheist, that the Christian boy announced that he too didn't believe in God. Before this happened, I spoke with his mum and said that she might reassure him that he wasn't going to burn in hell, as it could well be a concern for him and quite a scary concept for a child of 5 or 6 - well scary in the extreme! She took it OK, and did what she did about it, I don't know what that was, she didn't tell me.
I think it's very scary for children to not understand the casual web of all things. That in fact everything has a cause and is logically related to all events prior. When they have this reasonable understanding of the world they are much more likely to feel safe about things happening in sequence, and not be frightened about random events appearing. All the Theist children that I've come across suffer from nightmares or fear of supernatural or fictitious things such as ghosts, monsters and the like. I wondered if it might be a logical suspicion as they are told about God, but they can't see him and he is said to have great power - and so from this to imagining no end of scary things just appearing out of nowhere is a strong possibility.