This classic explains it:
https://www.amazon.com/Anti-Capitalistic-Mentality-Ludwig-Von-Mises/dp/1467934836
Those who cannot produce anything of real value to the human race hate those who can.
I just read the available excerpts there, but the book seems to be saying something somewhat different: that in the US the wealthy hobnob amongst themselves and avoid leaders in intellectual and artistic fields. This he says leads to a return resentment among those so spurned.
Now, accepting his premise that the artists and intellectuals are valued by and commingled with the wealthy in Europe, which presumably would make them feel accepted rather than spurned, he doesn’t begin to explain why the artists and intellectuals in Europe are if anything more extremely leftist than those over here.