[quacked]

Yes, that's all true, but that does not support the claim that the "American radical left is the European conservative right". In some ways, some of the demands of the American radical left mimic some of the expectations of European right-wing platforms, but the American radical left would still be identifiably left-wing in Europe, mostly due to their positions on immigration, regulation, sociology, and taxation.

The follow-up question to demonstrate this point would be "would an American who identifies as radically left-leaning join a European conservative right-wing party if they moved to Europe?"

[runarberg]

I think the claim here that: “The "radical" US left equals the conservative right in many European countries” is a bit of an exaggeration. A more accurate statement (and probably what OP meant; albeit less inflammatory) would be something like: “Moderate and conservative (i.e. mainstream) Democrats in America closely resemble the conservative right wing parties in Europe”. And I think this is largely true. Biden is in many ways to the right of Macron even though Macron is in the center-right of the political spectrum. While Bernie Sanders (the most left wing the US could possibly hope for) really only approaches the center-left Olaf Scholz.