Maybe it all comes down to what each of us defines Yiddishkeit as, but honestly a lot of Yiddish/Jewsih culture does not exist in the U.S. and does not even exist in NYC anymore.  One can say it's an evolution, but I honestly say the baby has been thrown out with the bathwater.  And while focusing on the state of Israel has united people, it has done so at the expense of others.
As far as Zionism goes, the literal meaning is indeed the existence, but as a practical matter many who claim to be Zionists are pretty cultish in their passion for such a state.
One day maybe a book, movie or something will come out and discuss the negative aspects of the cult-like mentality of many 1960 Zionists (for example), but for now it's a known secret in the community that these people be tolerated because we all believe in Israel. We all have to "stick together" which means not speaking ill. But you know what?  Zionists can be a pain-in-the-butt at times more than anything else.