My friend, I repeat again, the question is about proxies. Using mercenaries and terrorist organizations, hired guns and murderers to forward national objectives.
Why are you so meekishly explaining this as if you are sorry for the loss of whole world.
All powerful countries resort to all kinds of immoral forms to further their interests. This is an undeniable historical fact.
US has used proxies in all habitable continents and even now resort to using such proxies.
Indians used proxies in Bangladesh, Pakistan, Sri Lanka, Nepal, Afghanistan and even in Maldives.
The British, the French, the Israelis, the Saudis, many African countries and even Qataris and many other nations have used and are still using proxies.
Pakistanis have used proxies, but what they failed was in control of post operation blow-back and are suffering to an extent. They will learn from their mistakes.
The only problem has been that, the powerful few keep such freedom as their right while denying it to others.
This was brought to particular fore in post 9/11 environment, wherein some proxies were re-named as terrorists, and those left without sponsors were called non-state actors, and still many others were being created and those in existence were being used incognito.
Hence the use of proxies became kosher for the privileged few and for others it became the scourge of supporting of terrorism.
But if you feel that some how the world of nation states will become moral and seek heavenly purity, you are far from reality and do not understand the meaning of real-politik.
This will continue by whatever name one may like to give it, whatever the moral support it may be fueled in, as long as the space exists for its usage it will be used. And the space would always be there either for exploitation or for new creation.