If the US invaded Venezuela,or Iran,would NATO even blink? NATO is a rubber stamp for US imperial aspirations. NATO helps with most US "interventions",I won't call them wars because they're all done in the spirit of righteousness.
For Humanity's best interests.
Russia isn't with the program. That's a huge threat to US prestige and NATO security promises.
NATO is just the flavor of the day. It's empty promise of "security" is seen as more untenable with passing time.
In many ways this war is just as existential for NATO as it is for Russia or the Ukraine. If Russia Wins against the full weight of NATO backing and sanctions, NATO is seen less as invincible and imposing and more as confining and limiting the freedom of action of it's members.
The US has the most to lose. If would rightly be seen as all Mouth and little real substance if Russia were to achieve it's objectives in Ukraine.
So the risk of wider European war is Huge.
Given the stakes on both sides.
#9 If Russia attacks NATO for arming Ukraine that's the same logic you're pushing here. You're saying that unprovoked attacks on possible enemy suppliers are legitimate,even when no state of war exists between the two states involved. If Putin were to follow your logic he would bomb Raytheon and Lockheed Martin. It puts non combatants in harm's way and is frankly,a douche move.
Israel is dead wrong on this. They know it too. That's why they are denying responsibility.