He was born to András Hajdusik, a mechanical engineer and blacksmith, and Magdolna Tornai, and had four siblings. After completing high school, he spent his novitiate years in Máriaremete and Makó at the local Servite monastery. He was ordained a priest in Máriaremete on June 24, 1939. Under the code name “Béla,” he was recruited by the state security services in the 1950s through blackmail and coercion. He emigrated to Canada. In 1963, he oversaw the establishment of a new Hungarian church in Montreal, which was consecrated that same year.

On Sunday, July 19, 1970, he celebrated three Masses, delivering three homilies. Two were in Calgary, and one in Lethbridge after a 140-mile drive. The sermon he delivered in Calgary was about death: we can never know when we will have to appear before the Eternal Judge. Today? Tomorrow? In an hour, or a year from now? The night before, he had discussed with one of the parish leaders what we would do if we knew we were going to die in an hour. The priest quoted a saintly young priest whom the seminary rector had asked the same question while they were playing ball, to which he replied: “I would keep playing ball, because I am ready [for the call].”

On Monday, he returned to his parish. Around five o’clock in the afternoon, a woman called him: come quickly, because her husband was ill. Father Hajdusik set out immediately, as he always did when called to a sick person. When he reached the entrance of the house in question, a gunshot rang out and the priest collapsed, dead. The deranged man had shot him.

His body was laid in state in the cathedral, then flown to Montreal. The funeral Mass was celebrated by the diocesan bishop in the parish church, in the presence of 40 priests.