In September, Cypriot police narrowly foiled a plot by an Iranian agent to murder five Jewish businessman. This was but one of roughly a dozen similar operations that Tehran has conducted in Europe since 2015—on both Israeli or Jewish and American targets—which have left three dead. Matthew Karnitschnig traces the use of assassination as a strategic tool to the very beginning of the Islamic Republic, and explains its appeal:

In the West, assassination remains a last resort (think Osama bin Laden); in authoritarian states, it’s the first (who can forget the 2017 assassination by nerve agent of Kim Jong-nam, the playboy half-brother of North Korean dictator Kim Jong-un, upon his arrival in Kuala Lumpur?). For rogue states, even if the murder plots are thwarted, the regimes still win by instilling fear in their enemies’ hearts and minds. That helps explain the recent frequency. Over the course of a few months last year, Iran undertook a flurry of attacks from Latin America to Africa.

Whether such operations succeed or not, the countries behind them can be sure of one thing: they won’t be made to pay for trying. Over the years, the Russian and Iranian regimes have eliminated countless dissidents, traitors, and assorted other enemies (real and perceived) on the streets of Paris, Berlin, and even Washington, often in broad daylight. Others have been quietly abducted and sent home, where they faced sham trials and were then hanged for treason.

While there’s no shortage of criticism in the West in the wake of these crimes, there are rarely real consequences. That’s especially true in Europe, where leaders have looked the other way in the face of a variety of abuses in the hopes of reviving a deal to rein in Tehran’s nuclear-weapons program and renewing business ties.

Last month an Irish member of the UN Interim Force in Lebanon (UNIFIL) was killed by Hizballah guerrillas who opened fire on his vehicle. To David Schenker, it is likely the peacekeeper was “assassinated” to send “a clear message of Hizballah’s growing hostility toward UNIFIL.” The peacekeeping force has had a presence in south Lebanon since 1978, serving first to maintain calm between Israel and the PLO, and later between Israel and Hizballah. But, Schenker explains, it seems to be accomplishing little in that regard:

In its biannual reports to the Security Council, UNIFIL openly concedes its failure to interdict weapons destined for Hizballah. While the contingent acknowledges allegations of “arms transfers to non-state actors” in Lebanon, i.e., Hizballah, UNIFIL says it’s “not in a position to substantiate” them. Given how ubiquitous UN peacekeepers are in the Hizballah heartland, this perennial failure to observe—let alone appropriate—even a single weapons delivery is a fair measure of the utter failure of UNIFIL’s mission. Regardless, Washington continues to pour hundreds of millions of dollars into this failed enterprise, and its local partner, the Lebanese Armed Forces.

Since 2006, UNIFIL patrols have periodically been subjected to Hizballah roadside bombs in what quickly proved to be a successful effort to discourage the organization proactively from executing its charge. In recent years, though, UN peacekeepers have increasingly been targeted by the terror organization that runs Lebanon, and which tightly controls the region that UNIFIL was set up to secure. The latest UN reports tell a harrowing story of a spike in the pattern of harassment and assaults on the force. . . .

Four decades on, UNIFIL’s mission has clearly become untenable. Not only is the organization ineffective, its deployment serves as a key driver of the economy in south Lebanon, employing and sustaining Hizballah’s supporters and constituents. At $500 million a year—$125 million of which is paid by Washington—the deployment is also expensive. Already, the force is in harm’s way, and during the inevitable next war between Israel and Hizballah, this 10,000-strong contingent will provide the militia with an impressive human shield.