Cultural side note: Football fan mentality in the US vs Germany / Europe

While yesterday evening the German soccer club “Eintracht Frankfurt” knocked the great “FC Barcelona” out of the quarter-finals of the European League, at the same time tens of thousands of Eintracht fans took over the away stadium in Barcelona (the Camp Nou):

This points to an interesting difference in fan mentality in Europe / Germany and the US: the atmo in football stadiums in Germany / Europe compared to the US is “next level intensity”.

PS -
It’s similar in basketball: “Euro League vs NBA”