1) what's the difference between killings from Russian/Chinese/German/Belgian/US/Czech weapons? You lived in particular part of Africa so you hadn't a chance to see which weapons were used in many other conflicts there.
2) who forced African nations to buy so many weapons all over the world and kill each other in hundreds of wars between states, military coups and civil wars? Do the guys like Bout violate UN sanctions just for lulz or some people from countries that are listed in sanctions want to buy some arms and ask smugglers for them? Why don't you understand that it's their choice - to buy or not to buy arms, legally or not, to kill each other or to live peacefully? "If there is a request - then there will be an offer" - one of the main rules of human life. You want to get high - here's a drugs and alcohol. You want a gun - here it is, legal and not. If people don't want to live peacefully with each other - they'll find infinite numbers of the ways to kill their opponents. And Russian arms are only one item it this loooong list of way to kill. If some group says "Hey look at this cheap and easy available arms from USSR! Let's get'em and beat the cr@p out of that neighboring s&#@ers!" - it's their decision and their response for all they did with this arms. Arms don't make their users zombies that think only of murders and blood.