Please, I haven't seen any Russian sale yet which could be considered anything more than updating a country's right to defend itself. Yes, with updated more capable technology, of course, when the West is supplying modern tech to all their neighbours. I don't see it as an arms race, then they should get more instead of less aircraft than their neighbours. It's weapons trade, what are you going to do about it?
There's India with a huge Russian fleet, but you don't seem too worried about India?
And if supplying a handful of Su-35s to non-aligned countries makes the US worried and invest more on its own capability, in the end that helps them to face their own jets they've mistakenly supplied to countries around the world as well.
I'm not quite sure what you want Aviator. Deny a country the right to develop its own weapons and update its air force (Russia), or that you have a problem with them going to other countries as exports, or are seriously worried about Australia getting attacked (Malaysia? hahaha, I'd be more worried about China, but the easy solution to that is to just keep importing their goods), or you just have a problem with Muslims and (former) Communists?
Anyway, the thing is...
We can't control this. So let's view them on the basis of their technology and performance achievement. The Flanker is an amazing aerodynamic design, it's great to see this latest offering which addresses many of its shortfalls. Russia's R&D is back on track and delivering modern technology, you can say it's about time, you can say it isn't as good as Western tech, or that it is copied, doesn't matter... they are important achievements for the country's industry, which will let it compete with Western tech, and eventually find its way onto the civvie market as well, driving global competition and the need for innovation.
I had wished this topic could have focused on the RuAF, Sukhoi and the planes mentioned. That's why I initially deleted your reply Aviator, but you insisted, now look the mess we're in. Discussing the ethics of admiring weapons, the politics of arms trade and Red Dawn scenarios.