and there's natural cause of this.
Because, USA, by geography, is pretty much lonely, plus, USA is the most powerful. When you are most powerful, you don't care about others. (other than the fake sympathy which induced today's SJW scums)
while europe, are “little” countries with lots neighbors. It has to care, because what you are neighbors do affects you. Europeans tends to care more about the world. (but today it has been heavily fucked up by sjw, i think due to USA hedgemony)