Wtf does this have to do with the US escalating their military presence? You do realize that once the us officially get involved it’s WW3 with literal nukes, right? You don’t seriously think a territorial conflict between Russia and Ukraine is worth nuking the world over, do you?
Remember how WW1 escalated? Treaties calling everyone into a pointless war over someone else’s conflict.
Are you for real or are you being a troll?
Let’s say the us gets involved. Article 5 is invoked in NATO and we get a WW1 style escalation into world war. Major nuclear powers are all involved. Someone is going to use a nuke. Maybe tactically at first but it will quickly spiral out of control. Unless something happens that renders all nukes inert, their use is all but guaranteed in WW3.
World war is not good in any instance, regardless if it triggers nuclear Armageddon. Europe has only just recovered from 1 and 2.