I will answer your question from yesterday, Glorianny, though I would like to listen to your answers to Mollygo's pertinent questions too.
I would answer a Year 6 child, and especially a Year 4 child, very sensitively and with scant detail on the situation in Israel and Palestine. I would not encourage class discussion because many children might be distressed, some might get the wrong end of the stick, and for others, it would be way beyond their maturity and comprehension. If one child were really interested, I might invite them for a private chat later.
Can I ask what materials and resources you would use in discussion with a class of 9 year olds? We know we can't trust even the news items and bulletins. You could find a resource online designed to support factual teaching about the Israeli-Palestinian conflict, which is a political issue. But will it be accurate, will quotes from political figures have been abridged, and will important contextual information have been omitted? Pupils of 9 years old will be unaware that the resource promotes a partisan political view.
In addition, could you be 100% sure that you could deliver a totally non-biased lesson when your own views were so strong as to colour any discussion, like we see on GN?
So, in short, if it were me, I would avoid discussion of the topic in a Year 4 or 6 class setting.