"[5] He was the sole surviving witness of the October 7, 1944, revolt at Auschwitz-Birkenau, when a group of Jewish prisoners blew up Crematorium Number 4 and attempted to escape.
[10] He also initiated his activity protesting against neo-Nazism by donning a facsimile of his Auschwitz prison uniform and picketing the appearance of a German neo-Nazi leader on Canadian television.
[12] In 1989, then living in Fort Assiniboine, Alberta, he organized the first Remembrance Service at Edmonton's Holy Rosary Polish Catholic Church attended by local Jewish representatives.
He told a reporter after that program that while it was bad to be a Catholic in Auschwitz, "to be a Jew there was hopeless", and that he was concerned that the "Nazi crimes against humanity will be forgotten and swept under the carpet".
[13] In 1990, he retraced the route he travelled unwillingly 50 years earlier from Tarnów to Auschwitz-Birkenau to campaign for the creation of four "meditation gardens" at that death camp.
[16] Sobolewski traveled the world lecturing audiences on his experiences in Auschwitz and warning against Holocaust denial,[5] including a speaking engagement as recently as 2009 to high school students in Alabama.