Perhaps you have missed the part where Israeli citizens have been openly saying that we need to wipe Iran, Palestine and multiple other countries off from the world map.
Not like Iranian and Palestinian people haven't said anything similar. This issue is not black and white. There's a hundred of different shades of piss and shit. Everyone is right from their standpoint and everyone is wrong from other's standpoint.
I found that visitng shop frequently and buying a little each time helps with this. Also, knowing what you have and planning what to cook with stock in mind. Also, one might find better to buy at small grocery stores (turkish in my area). These have ability to buy as an example 10 or less potatoes instead of fixed 2.5kg of potatoes. That way you're not bound to swiftly eat potatoes before they rot.