Jealousy in America

If there is something that isn't front and center in the American culture it's jealousy. It's something that is never discussed openly and while some anthropologists have stated that jealousy varies across cultures, it seems to me that American culture has made it a sin and by being not exercised freely, it pops its ugly head now and again.

European seem to be more accepting of jealousy and appear to use it whenever it feels appropriate. All this makes me say that in America, jealousy is taboo, uncool and never to be expressed publicly, but like a wild volcano it's inevitably bound to erupt now and then under forms that can be most surprising.

If you know American culture or are part of it, what's your opinion on that?