The the terror attacks of 9-11 were in reality a result of a conspiracy of Al Qaeda Islamists with the cooperation of the Taleban government of Afghanistan. However, elaborate theories have been constructed to lay the blame for 9-11 on "Zionists." As described by Bradley Burston:

I was handed a complimentary DVD by a 9/11 conspiracist. It was a newly enhanced version of the Protocols of the new millennium, the theory - simultaneously promulgated by elements of the far left, the far right, and fundamentalist Islam, people who in every other respect hate each others' guts and each others' every opinion - that it was Israel and the Mossad that brought down the World Trade Center.
...the ADL said last month that "Today, those theories are even more widespread and some have taken their anti-Semitic allegations even farther by claiming that it was specifically Jewish members of the Bush Administration who directed the government in planning the attacks for the benefit of Israel."

The war in Iraq, and more recently, Iraqi terror, are of course blamed on Jews and Zionists as well.
A conspiracy of the Arab Lobby has blocked international efforts to stop the genocide in Darfur. As
Jeff Weintraub noted a while ago, President Bashir of Sudan blamed the international outcry against the murder of hundreds of thousands on the Jews.
More recently, Ned Goldstein has documented both the agony of Darfur and the pernicious and evil Zionist conspiracy to save Dafur at ww4report.com/node/2582 (no links for bad guy Web sites):

The death toll in the Darfur region of western Sudan has reached between 200,000 and 400,000 as of Oct. 1, with 2.5 million displaced. The UN warns that the death toll could escalate precipitously if the situation is allowed to deteriorate. The dictatorial — and genocidal —Khartoum regime led by Omar al-Bashir, is possibly the world's most brutal and murderous.

That's pretty horrible right? You would think that Goldstein and all the anti-war people would welcome any effort to stop the carnage? But it isn't so. Goldstein explains that the save Darfur campaign is meant to distract attention from Israeli atrocities in Lebanon and also:

Israel advocates had hoped the Save Darfur movement would do more to renew the Black-Jewish alliance that went back to the civil rights era in the US.

The fact that US Arab advocate James Zogby participates in the Save Darfur campaign does not deter Goldstein. Darfur, like treatment of homosexuals in Arab/Muslim sociaety, and like 9-11, is real problem for "progressives." How can they square uncritical support for Islamist and Israel causes with progressive values? How can they rationalize their apologetics for groups that kill thousands of innocent people? How can they rationalize away their criminal failure to act in saving lives in Darfur? It doesn't occur to Goldstein that the best way to "de-Zionize" the save Darfur campaign is to get everyone involved in it. It doesn't occur to Brian Whitaker that the reason Israel has liberal laws about sex behavior is that Israel is really a democratic society, not because such laws are a propaganda ploy. It doesn't occur to conspiracy theorists that so many Zionists turned out to save Darfur is that Zionism is really not racism. The people who stayed home and turn their backs on Darfur are the racists.

You don't have to be a Zionist to try to stop the agony of Darfur and the war crimes and crimes against humanity of the Sudanese government. Everyone can help save Darfur by writing to President Bush and UN Secretary General Kofi Annan: Click here to do it: www.democracyinaction.org/dia/organizationsORG/darfur/campaign.jsp.

Too bad for all those staunch segregationists in the Southern USA. They didn't think of blaming the civil rights movement on the "Zionists," even though many of the people who fought for integration in the US were Jews and Zionists, and likewise many of those who fought against Apartheid in South Africa. If you can associate your cause with anti-Semitism or "anti-Zionism" you can get several billion recruits instantly, as Adolf Hitler understood so well.

Very likely, the next evil to be blamed on the Zionists is the North Korean A-bomb or the fight against it. We can envision several versions of this theory. One version will hold that Kim Jong Il is really a Mossad spy who had plastic surgery. He got the nuclear technology from Mossad agents. A second theory will explain contrarily that it is only Jews who are interested in stopping North Korea from obtaining nuclear weapons, just as it is widely accepted that only "Zionists" are worried about the Iranian nuclear development program. The latter theory will probably be propagated by the North Korean government. Pretty soon Counterpunch, Antiwar and similar sources of enlightenment will be insisting that "Zionist neocons" and Mossad agents have infiltrated the governments of China, Russia, France and the US.

www.zionism-israel.com/log/archives/00000261.html