The connection with Europe would appear to benefit millions of Americans.
Very broadly I think the US has done a poor job explaining just how beneficial America's position in the world is to America itself. You see it reflected in the USAID stuff too. Soft power pays dividends in ways that aren't immediately apparent so when it's gone people just don't care all that much. It'll be interesting to see where this all lands 20 or so years from now and how the US public feels about it then.
It’s not perfectly efficient, and it can suffer from the problem you’re describing, but far less severely than the US system does.
Winner take all (one winner): FPTP, single member district ranked ballots
Proportional (multiple winners): Party lists, MMP, multi-member district ranked ballots (STV)
Diplomacy and soft power is a complex, nuanced concept that can't be explained easily.
This brings a wider perspective, which is why what Elon is doing is so scary because it takes out that wider perspective
But in all seriousness, my bewilderment isn't so much that Reagan's stance against Russia was discarded (parties change over time, as well as the relationship between nations), but that it happened with zero pushback and zero discourse. The party leader said, with no explanation, "Our #1 enemy is now our ally" and the party simply said "But of course, no one should doubt this!"
For quite a long time (decades) Soviet Union/Russia was vilified like no other…
Heck, even the general public knew that Russia was the only country that could wipe us off the map with their nukes…
Current leaders grew up and were in the prime of their life during those times…