Four people were wounded in Manchester today - one stabbed, three mown down by a car - outside a synagogue on Yom Kippur, the holiest day in the Jewish year. The attacker was shot dead by police. The attack is the result of years in which antisemitic rhetoric has been allowed to fester and grow unchecked - on our streets, in our schools, on our campuses, across social media, and from within politics itself. It is fed every weekend by pro-Palestinian marches that exude raw Jew-hate: chants of "From the river to the sea," cries of "Khaybar, Khaybar," placards likening Israel to Nazi Germany, and the relentless drumbeat that frames the Jewish state as a genocidal pariah. Words like these do not evaporate harmlessly. They embolden. They license hatred. They teach that Jews are fair game. The danger today was so clear that police launched Operation Plato - Britain's emergency response to marauding terror attacks. That protocol isn't triggered lightly; it exists for the nightmare scenario of roaming killers on the hunt. Police feared Jews gathering to pray might be prey. That alone should shake this country to its core. Yet while the immediate threat was contained, the climate that produced it was built over years by cowardice and indulgence. Instead of drawing a line between legitimate criticism of Israeli policy and the demonisation of an entire people, our political class blurred it beyond recognition. The casual use of the word genocide - repeated by left-wing MPs, echoed by ministers, amplified by media desperate for moral theatre - has consequences. If you tell the public over and over that Israel is exterminating people, do not feign surprise when men with knives and cars see Jews themselves as fitting enemies. Adding fuel is the long courtship between the Left and Islam. This isn't conspiracy; it's political fact. Since the late 1990s, when the term "Islamophobia" was engineered and pushed into policy, a shield has silenced scrutiny of Islamist ideology by branding it bigotry. Under that cover came decades of looking away - from misogyny, grooming gangs, radical preaching, and now the antisemitic undercurrents spilling out of pro-Hamas networks. Universities have become test beds for this alliance: campuses where Jewish students are isolated, abused, told to answer for Israel's existence, and abandoned by staff and unions who parrot slogans reducing a living people to a colonial sin. All the while, British institutions have shrunk from the fight. Police look for "balance" when there is none to find. Party leaders issue tepid condemnations sandwiched between affirmations of protest. Social media companies act with speed against unfashionable speech but leave posts glorifying violence against Jews to fester. The result is a culture where hate thrives, intimidation is normalised, and knives find their mark outside a synagogue. If this continues unchecked, Jewish life in Britain will wither. Parents will hesitate before sending children to Jewish schools. Synagogues will harden behind concrete and steel. Ordinary families will live with fear as a constant companion. And Britain itself will be diminished - because a country that cannot protect its Jews is a country that has lost its moral spine. It's time to break with cowardice. The government must draw a clear line: protests with antisemitic chants or terror glorification are not "free speech" but incitement and must be shut down. Universities tolerating Jew-baiting should lose funding until they enforce their codes. Social media must act on the high-visibility hate they let spread. And leaders who cried "genocide" must own the permission they gave to hate. Britain stands at a crossroads: today's blood in Manchester echoes the hate we've excused - name the antisemitism, confront it, or watch the darkness spread. "The government must draw a clear line: protests with antisemitic chants or terror glorification are not "free speech" but incitement and must be shut down."