You're only feeling comfortable when you let yourself be carried away by the atmosphere of the film. A friend of mine said he was shown as positive and cool. I dont agree, I think he's cold and unhuman throughout the whole film.
The film doesnt actively take sides, although the message is clear: Yuri is the evil one, but it's not that simple, since he's not the actual problem, the people killed with his guns wouldnt live without him, as someone else would take his place.
That doesnt mean he's any less guilty, but only that the problem lies elsewhere, in the system. The thing I found most fucked up is that you cant draw a clear line. Yuri is selling guns, the consequences of his acts are quite obvious, but what of the people who may not even know they're contributing to the wars? In 5 years or so from now, I may be working as a machine engineer. Who garantuees me the engines I may be working on dont end up in armored vehicles/tanks used to kill people or break international law?
Im sure none of the engineers at Deutz knew their engines were being sold to a ukrainian company only to end up in BTR-3U Armoured Personnal Carriers