As Iran continues to provoke the United States and its allies—sabotaging oil tankers, shooting down an American drone—it’s important to remember another kind of threat the Islamic Republic has in its arsenal if unchecked: its ally Hizballah, and, specifically, the Lebanese militia’s special-operations cells, which could be sent to attack not only Israel but the United States itself. “Hizballah is clear that if it comes to an American war with Iran, it wants in on the fight,” writes the analyst Matthew Levitt.

[This] is where Hizballah’s external operations apparatus, the Islamic Jihad Organization (IJO) or Unit 910, comes into play. Over the past several years, Hizballah IJO activities have been on the rise. The uptick began in 2008 as a means of avenging the assassination of Hizballah arch-terrorist Imad Mughniyeh, and later continued as a factor in Iran’s shadow war with the West over Tehran’s nuclear program.

Hizballah’s last successful attack targeted Israeli tourists in Burgas, Bulgaria, in 2012. But a long list of other plots has since been foiled around the world in places as far afield as Bolivia, Cyprus, Peru, Thailand, and the United Kingdom. Hizballah pre-operational surveillance occurred in Canada, Panama, the U.S., and elsewhere.

A recent case involving a Hizballah operative named Ali Kourani, who was arrested by the FBI, illustrates how Iran might order such attacks:

During one of Kourani’s meetings with the FBI, an interviewing agent recalled, Kourani sat back in his chair, squared his shoulders and stated, “I am a member of 910, also known as Islamic Jihad or the Black Ops of Hizballah. The unit is Iranian-controlled.” Within Hizballah, the unit reports directly to Nasrallah, according to Kourani, but Iran oversees the unit’s operations.

Kourani went on to describe himself to the FBI as being part of a “sleeper cell,” and explained, “There would be certain scenarios that would require action or conduct by those who belonged to the cell.” Kourani said that in the event that the United States and Iran went to war, the U.S. sleeper cell would expect to be called upon to act. And if the United States were to take certain unnamed actions targeting Hizballah, [its chief Hassan] Nasrallah himself, or Iranian interests, Kourani added, “in those scenarios the sleeper cell would also be triggered into action.”

One only need to look at Argentina to see what this kind of threat is capable of.

Two extraordinary events demonstrate something important about Israel’s most fervent adversaries. One was a speech given at something called The People’s Forum (funded generously by Goldman Sachs), which stated, “When the state of Israel is finally destroyed and erased from history, that will be the single most important blow we can give to destroying capitalism and imperialism.”

The suggestion that this tiny state is the linchpin of a global, centuries-old phenomenon like capitalism goes well beyond anything resembling rational criticism. Even if Israel were guilty of genocide, apartheid, and oppression—which of course it is not—it would not follow that its destruction would help end capitalism or imperialism.

The other was an anti-Israel protest that took place in front of New York City’s Memorial Sloan Kettering Cancer Center, deemed “complicit” in Israel’s evils. At organizers’ urging, participants shouted their slogans at kids in the cancer ward, who were watching from the windows. Given Hamas’s indifference toward the lives of Gazan children, such callousness toward non-Palestinian children from Hamas’s Western allies shouldn’t be surprising. The protest—like the abovementioned speech—deliberately conveyed the message that Israel is the ultimate evil and its destruction the ultimate good, cancer patients be damned.

The fact that Israel’s adversaries are almost comically perverse does not mean that they can be dismissed. If its allies fail to understand the obsessive and irrational hatred that it faces, they cannot effectively help it defend itself.