Beginning in the 1990s, and even more after 9/11, US support has been justified by the claim that both states are threatened by terrorist groups originating in the Arab and Muslim world, and by ‘rogue states’ that back these groups and seek weapons of mass destruction. This is taken to mean not only that Washington should give Israel a free hand in dealing with the Palestinians and not press it to make concessions until all Palestinian terrorists are imprisoned or dead, but that the US should go after countries like Iran and Syria. Israel is thus seen as a crucial ally in the war on terror, because its enemies are America’s enemies. In fact, Israel is a liability in the war on terror and the broader effort to deal with rogue states.

‘Terrorism’ is not a single adversary, but a tactic employed by a wide array of political groups. The terrorist organisations that threaten Israel do not threaten the United States, except when it intervenes against them (as in Lebanon in 1982). Moreover, Palestinian terrorism is not random violence directed against Israel or ‘the West’; it is largely a response to Israel’s prolonged campaign to colonise the West Bank and Gaza Strip.

More important, saying that Israel and the US are united by a shared terrorist threat has the causal relationship backwards: the US has a terrorism problem in good part because it is so closely allied with Israel, not the other way around. Support for Israel is not the only source of anti-American terrorism, but it is an important one, and it makes winning the war on terror more difficult. There is no question that many al-Qaida leaders, including Osama bin Laden, are motivated by Israel’s presence in Jerusalem and the plight of the Palestinians. Unconditional support for Israel makes it easier for extremists to rally popular support and to attract recruits.

As for so-called rogue states in the Middle East, they are not a dire threat to vital US interests, except inasmuch as they are a threat to Israel. Even if these states acquire nuclear weapons – which is obviously undesirable – neither America nor Israel could be blackmailed, because the blackmailer could not carry out the threat without suffering overwhelming retaliation. The danger of a nuclear handover to terrorists is equally remote, because a rogue state could not be sure the transfer would go undetected or that it would not be blamed and punished afterwards. The relationship with Israel actually makes it harder for the US to deal with these states. Israel’s nuclear arsenal is one reason some of its neighbours want nuclear weapons, and threatening them with regime change merely increases that desire.

A final reason to question Israel’s strategic value is that it does not behave like a loyal ally. Israeli officials frequently ignore US requests and renege on promises (including pledges to stop building settlements and to refrain from ‘targeted assassinations’ of Palestinian leaders). Israel has provided sensitive military technology to potential rivals like China, in what the State Department inspector-general called ‘a systematic and growing pattern of unauthorised transfers’. According to the General Accounting Office, Israel also ‘conducts the most aggressive espionage operations against the US of any ally’. In addition to the case of Jonathan Pollard, who gave Israel large quantities of classified material in the early 1980s (which it reportedly passed on to the Soviet Union in return for more exit visas for Soviet Jews), a new controversy erupted in 2004 when it was revealed that a key Pentagon official called Larry Franklin had passed classified information to an Israeli diplomat. Israel is hardly the only country that spies on the US, but its willingness to spy on its principal patron casts further doubt on its strategic value.

Israel’s strategic value isn’t the only issue. Its backers also argue that it deserves unqualified support because it is weak and surrounded by enemies; it is a democracy; the Jewish people have suffered from past crimes and therefore deserve special treatment; and Israel’s conduct has been morally superior to that of its adversaries. On close inspection, none of these arguments is persuasive. There is a strong moral case for supporting Israel’s existence, but that is not in jeopardy. Viewed objectively, its past and present conduct offers no moral basis for privileging it over the Palestinians.

Israel is often portrayed as David confronted by Goliath, but the converse is closer to the truth. Contrary to popular belief, the Zionists had larger, better equipped and better led forces during the 1947-49 War of Independence, and the Israel Defence Forces won quick and easy victories against Egypt in 1956 and against Egypt, Jordan and Syria in 1967 – all of this before large-scale US aid began flowing. Today, Israel is the strongest military power in the Middle East. Its conventional forces are far superior to those of its neighbours and it is the only state in the region with nuclear weapons. Egypt and Jordan have signed peace treaties with it, and Saudi Arabia has offered to do so. Syria has lost its Soviet patron, Iraq has been devastated by three disastrous wars and Iran is hundreds of miles away. The Palestinians barely have an effective police force, let alone an army that could pose a threat to Israel. According to a 2005 assessment by Tel Aviv University’s Jaffee Centre for Strategic Studies, ‘the strategic balance decidedly favours Israel, which has continued to widen the qualitative gap between its own military capability and deterrence powers and those of its neighbours.’ If backing the underdog were a compelling motive, the United States would be supporting Israel’s opponents.