Until recently, most NATO members were not meeting their commitment to spending 2% minimum GDP on defense. They were demonstrably externalizing their defense costs onto the US.
The only country that ever actually asked for help as NATO member was USA. And they helped. And now, the biggest threat is USA, who is trying to cast itself as a victim.
This is not the case of Europe externalizing the cost. It is the case of USA using other countries for own benefit, then starting aggression against them while trying to cast itself as victim.
Well yes, since the commitment was to spend 2% by 2025.