I have been horrified by the Russian invasion of Ukraine and am fully supportive of the sanctions on Russia and also ammunition/munitions support given to the Ukrainian Government. But the now common talk of so-called NATO-imposed no-fly zones etc, effectively means Western war with Russia and is utter and compete madness. Far from saving lives the result will be that many more will die.
At best attacks by NATO aircraft on Russian planes or other military positions in Ukraine will simply drive many so-far war-sceptical Russians into the arms of Putin's war rhetoric, and support for yet more killing and retaliation. Why embolden Putin and convince Russians more thoroughly that NATO is really at war with them? It risks a far, far larger number of lives than we can ever save in Ukraine (whether or not things go nuclear), no matter how barbaric the artillery attacks on Ukrainian cities may be. Once NATO starts an attack, there is no knowing where things will end. War is very unpredictable, so why open Pandora's box?
It may, of course, be that the act of supplying surface to air missiles and anti-tank weapons etc via Poland or wherever risks conflict with the Russian military. Well, on balance, I think that risk is one that is worth taking, The risk involves the danger of efforts by Russian forces to intercept that support, and leaves it open to NATO to decide a response if that is the case.
However, a premediated attack by NATO on Russian forces is an altogether different act. It is a an act of sheer unadulterated madness. You don't require a war gaming analysis to work that one out. Please leaders of the Western World, do not get carried away by too much liberal rhetoric. The road to hell is paved with liberal intentions.