Israel's former ambassador to the US, Michael Oren, has spent a lifetime defending the Jewish state in hostile forums and friendly gatherings.

It shows in this marvelous op-ed in the Wall Street Journal where he carefully explains, and in great detail, the reasons that Zionism is one of the most consequential ideas in history.

They come from every corner of the country—investment bankers, farmers, computer geeks, jazz drummers, botany professors, car mechanics—leaving their jobs and their families. They put on uniforms that are invariably too tight or too baggy, sign out their gear and guns. Then, scrambling onto military vehicles, 70,000 reservists—women and men—join the young conscripts of what is proportionally the world's largest citizen army. They all know that some of them will return maimed or not at all. And yet, without hesitation or (for the most part) complaint, proudly responding to the call-up, Israelis stand ready to defend their nation. They risk their lives for an idea.

The idea is Zionism. It is the belief that the Jewish people should have their own sovereign state in the Land of Israel. Though founded less than 150 years ago, the Zionist movement sprung from a 4,000-year-long bond between the Jewish people and its historic homeland, an attachment sustained throughout 20 centuries of exile. This is why Zionism achieved its goals and remains relevant and rigorous today. It is why citizens of Israel—the state that Zionism created—willingly take up arms. They believe their idea is worth fighting for.

But in many corners of the world, Zionism has become a dirty word:

In certain academic and media circles, Zionism is synonymous with colonialism and imperialism. Critics on the radical right and left have likened it to racism or, worse, Nazism. And that is in the West. In the Middle East, Zionism is the ultimate abomination—the product of a Holocaust that many in the region deny ever happened while maintaining nevertheless that the Zionists deserved it.

What is it about Zionism that elicits such loathing? After all, the longing of a dispersed people for a state of their own cannot possibly be so repugnant, especially after that people endured centuries of massacres and expulsions, culminating in history's largest mass murder. Perhaps revulsion toward Zionism stems from its unusual blend of national identity, religion and loyalty to a land. Japan offers the closest parallel, but despite its rapacious past, Japanese nationalism doesn't evoke the abhorrence aroused by Zionism.

Clearly anti-Semitism, of both the European and Muslim varieties, plays a role. Cabals, money grubbing, plots to take over the world and murder babies—all the libels historically leveled at Jews are regularly hurled at Zionists. And like the anti-Semitic capitalists who saw all Jews as communists and the communists who painted capitalism as inherently Jewish, the opponents of Zionism portray it as the abominable Other.

Zionism's accomplishments, writes Oren, are truly awe-inspiring:

Indeed, by just about any international criteria, Israel is not only successful but flourishing. The population is annually rated among the happiest, healthiest and most educated in the world. Life expectancy in Israel, reflecting its superb universal health-care system, significantly exceeds America's and that of most European countries. Unemployment is low, the economy robust. A global leader in innovation, Israel is home to R&D centers of some 300 high-tech companies, including Apple, Intel and Motorola. The beaches are teeming, the rock music is awesome, and the food is off the Zagat charts.

The democratic ideals integral to Zionist thought have withstood pressures that have precipitated coups and revolutions in numerous other nations. Today, Israel is one of the few states—along with Great Britain, Canada, New Zealand and the U.S.—that has never known a second of nondemocratic governance.

These accomplishments would be sufficiently astonishing if attained in North America or Northern Europe. But Zionism has prospered in the supremely inhospitable—indeed, lethal—environment of the Middle East. Two hours' drive east of the bustling nightclubs of Tel Aviv—less than the distance between New York and Philadelphia—is Jordan, home to more than a half million refugees from Syria's civil war. Traveling north from Tel Aviv for four hours would bring that driver to war-ravaged Damascus or, heading east, to the carnage in western Iraq. Turning south, in the time it takes to reach San Francisco from Los Angeles, the traveler would find himself in Cairo's Tahrir Square.

Zionism, as an animating feature of the Jewish state, is clearly one of the most successful ideas in the history of civilization. Perhaps its very success is what so many object to. Many people  living in desperate poverty and under cruel regimes around the world look at Israel and compare it to their own miserable existence and seek to ascribe other reasons for their plight than bad government. In the end, they can't escape the truth that what they really lack is something good and true to believe in.

While anti-Semitism is not exactly the same as anti-Zionism, the latter is often used as a beard to mask the anti-Semite's true feelings. Muslims are expert practiioners of this false conciousness. They are easily seen through because they constantly conflate Zionism with Judaism, which, as Oren explains, is only half the story.

Read Oren's entire article.