Nobody is taking away weapons. Nobody. Nobody.
First of all you provided the numbers and no I did not say 50% of murders are illegal weapons. But it doesnt matter.
You can buy all the weapons you want as long as you pass a background check. Using your analogy, it would probably be a great step towards disarming the middle east (Not that I believe that is a good or plausible idea, im just following your anaolgy through)if the world began a policy that for now on if a middle eastern country wants to buy a weapon, they can’t have had a history of mental illness etc. Who would oppose such a policy?