By way of muddying the waters of my previous post, allow me to say that one of the most intelligent and prominent figures of the eclipsed social-democrat-EU-model of Zionism was Yossie Beilin. Yet some future biographer of his may yet conclude that his single most important contribution to Israel and the Jewish people was his creation of the Birthright programs. He didn't do it alone, of course, but he played an important role.
Anyway, allow me to introduce you to Wayne Hoffman's What We Brought Back: Jewish Life After Birthright- Reflections by Alumni of Taglit-Birthright Israel Trips. If you'd like, you can start by reading one of the stories, which doesn't fit into any standard pigeon holes.