After a good deal of publicity following the incident, Sainsbury’s apologized to its Jewish customers. “This will not happen again,” its corporate-affairs director, Trevor Datsun, said, according to The Jewish Chronicle. “Managers will be told not to move kosher food because of some perceived threat.”

Why do I find this incident to be more disturbing than, say, reported attacks on kippah-wearing Jews, or the scrawling of swastikas on Jewish shops?

To the extent that it suggests that Israel and Judaism have been thoroughly conflated in the minds of many Europeans, the Sainsbury's kosher controversy is similar to other recent incidents. Kosher products—in the case of the Sainsbury’s branch in question, some apparently from the U.K. and Poland—were intuitively understood to be stand-ins for Israel itself, just as French Jewish males wearing kippot were understood by their attackers to be stand-ins for Israeli Prime Minister Benjamin Netanyahu.

We have learned a number of unfortunate truths about the nature of the global anti-Israel movement this summer. One is that the war in Gaza is understood by many to be a continuation of Israel’s 1948 War of Independence, and not of the 1967 Six Day War. Which is to say, many protesters are challenging Israel’s very right to exist, not its policies in the territories it came to occupy in 1967 (or in Gaza’s case, territory it occupied in 1967 and then turned over to Palestinians in 2005). A second is that the line separating anti-Zionism—the belief that Jews have no right to an independent state in at least part of their ancestral homeland—and anti-Judaism, already reed-thin, has pretty much vanished.

And yet, the Sainsbury’s incident is disturbing not so much for what it says about the nature of European anti-Israelism, but for what it says about the broader response within Europe to forces of intolerance and hatred. Employees of the Sainsbury’s branch in central London seemed to have understood, based on an accurate reading of recent events, that anti-Israel activists posed a threat to their store, and perhaps to their own physical well-being. And so the manager made a decision to surrender to the mob and engage in what could only be called an act of self-preservational, but objectively anti-Semitic, preemption.

Cowering of this sort is a sign that a country is losing the ability to stand for the values it professes to maintain. In the U.K., it is also a sign that a society hasn’t fully grappled with the radical intolerance exhibited by some of its citizens.

The Sainsbury's incident happened in the same city in which recruiters for Islamic State, the too-radical-for-al-Qaeda group that executed American photojournalist James Foley, have been seen openly passing out propaganda. It happened in the same place where what appeared to be a jihadist flag flew outside a housing estate. As many as 1,500 Britons are apparently fighting for Islamic State's cause. There are said to be more British Muslims fighting on behalf of Islamic State than for the U.K.'s military. Foley’s executioner, currently the world’s most infamous terrorist, is widely believed to be a British subject.