Fifty years ago this weekend, on 17 July 1976, Queen Elizabeth II declared the Montreal Olympics open in front of a stadium that was still, in places, a building site. Among the delegations filing past the royal box was one whose flag carried something no other did: a black ribbon, tied on for the eleven Israeli team members murdered at the Munich Games four years earlier. Holding that flag aloft was a 24-year-old sprint hurdler from Tel Aviv, Esther Roth-Shahamorov, and no athlete in the stadium carried more of the story in her own body.

In Munich in 1972, Roth had been Israel's brightest track prospect. She reached the semi-finals of the 100 metres and qualified for the semi-finals of the 100 metres hurdles — and then never ran them. On 5 September, members of the Palestinian group Black September seized the Israeli quarters in the Olympic village; by the end of the failed rescue at Fürstenfeldbruck, eleven Israelis were dead. Among them was Amitzur Shapira, the coach who had guided Roth since her teens. Israel withdrew from the Games, and Roth went home with her career suspended mid-stride.

Montreal was therefore never going to be an ordinary Olympics for Israel. The delegation of 28 competitors — 26 men and two women, across ten sports — arrived at Games already diminished by a 26-nation boycott, most of it African, over New Zealand's rugby ties with apartheid South Africa. Ninety-two countries remained. For Israel, the temptation was to treat the fortnight as an act of witness: march, mourn, be seen to have returned. The black ribbon on the flag said exactly that.

Roth refused to let remembrance be the whole assignment. She had spent the intervening years proving the point in stages, winning sprint and hurdles gold at the 1974 Asian Games in Tehran, and she came to Canada in the form of her life. Her 12.93 seconds for the hurdles that year would stand as the Israeli record for the next quarter of a century.

In Montreal she moved through the rounds of the 100 metres hurdles and, in doing so, crossed a line no Israeli had crossed: she became the first athlete from the country, in any sport, to reach an Olympic final.

The final itself delivered a result that reads modestly and meant everything. Roth finished sixth in 13.04 seconds. No medal, no podium — but a placing among the eight fastest hurdlers on earth, achieved by an athlete whose previous Olympics had ended in a morgue's shadow rather than on a track.

Half a century later she remains Israel's only Olympic track finalist, a fact that measures both her quality and how steep the mountain has stayed.

Nor was she carrying the delegation alone. Weightlifter Eduard Weitz finished fifth in his class, at that point the best Olympic placing by any Israeli in any sport, and the footballers ground out three draws to reach the quarter-finals before Brazil ended their run. Quietly, in the most emotionally loaded fortnight Israeli sport had known, Montreal became its most successful Games to date.

That is the real argument of Montreal 1976: it is the moment Israeli Olympic sport stopped being defined solely by what had been done to it and started being defined by what it could do. The ribbon and the finish line coexisted on the same flag.

Roth's national record survived until Irina Lenskiy lowered it in 2002, and the idea she raced into being — that an Israeli athlete belongs in an Olympic final on merit, not on sympathy — outlasted even the record. Fifty years on, as another World Cup weekend fills the calendar, that July evening in Montreal remains the hinge on which a sporting culture turned.