You are spending too much time in an echo chamber if you think that those things that are unheard of in the US could not have been done in the US. They could have been, but it would have required a different kind of path than you chose.
The EU has chosen to try to cooperate rather than to be at war all the time and it looks like that may have been a wrong bet but that is mostly because first one (Russia) and now another (USA) party have reneged on the deals that were in place.
They could have been done is my contention.
But not while carrying Euros’ defense obligations