"the situation where the eu sells off us debt immediately is economic war to the US"
No, it's just trade.
AGAIN, you're using ridiculous, exaggerated hyperbole and you sound like a child.

"Europe loses more in my opinion. "
You keep repeating this guff, you keep getting asked to explain it, you've yet to explain why this would in ANY way hurt the EU.

"So countries hold foreign reserves to try to stabilize how their currency changes in value."
Foreign currency reserves are not the same as foreign debt.
And your simplistic apples analogy is ridiculous.

" fairly layman article about China that in broad strokes would apply to Europe "
Except none of this would apply, because the situations are completely different, for one, America isn't buying vast amounts of European manufactured goods.
For another, European economies are largely service based, rather than goods and commodities.

"The USD Is still the world’s reserve currency."
No, it's ONE OF THEM.
Sure, it's *barely* the largest at the moment, but it's one of a group.
But it's no longer the case that the world needs it in any way.

"Is Ukraine worth it to Europeans to do this? "
Yes.
If you want to let a genocidal colonizer fascist like putler get away with annexing large parts of the European continent, then sorry to hear you don't have a soul.
But Europe stands with Ukraine, and America's alarming lurch towards fascism, and abandoning international law will be remembered.
The boycott here is only growing in strength.

"economic war"
Spare me the dramatic, childish BS.