First, why would we want Europe - we don’t. In fact, I would seriously and completely resist the US getting involved in saving Europe the next time. Second, the existing NATO commitments haven’t been met in decades and I regard European troops at best, as ineffective. I don’t believe for a second they could field a credible military in the next 30 years without wholesale changes to the European culture.
We should embrace the offer, disband NATO and get out except for ports and airbases that serve our interests.
This is in case ethnic Germans ask for help with their “newer” citizens. We, or anyone offering assistance would be met at the border by the new EU army comprised of imports from the third world.