Again, I don't think you're considering the scale of loss there since these numbers are so huge. Let's look at it another way. We could kill literally every single person in Syria/Yemen/Libya/Iraq/Afghanistan/Somalia and it still wouldn't even be remotely comparable to the scale of loss of WW2. You'd be a shade over half way there. And like you mentioned this is something that's been going on for many years. All that death in WW2 was compressed into 6 years - most of it within 3.

When we look at the minuscule fraction of the real loss of life in the Mideast it's completely and absolutely negligible compared to the sort of wars we've had in the past. And that's largely due to the fact that modern nations no longer fight. If nations like China and the US were capable of fighting each other without mutually assured destruction, we would have. And that is a conflict that almost certainly would have drawn in the entire rest of the world to one side or the other and the death toll there would dwarf WW2 and anything else - at least until WW4.

Instead we're approaching the centennial of WW2 meaning we have had generations live, and mostly die, without ever experiencing the sort of death and destruction that used to be regularly wrought in war. And for this, we can thank nuclear weapons.