Ten years AFTER the students yearbook, the BBC had a weekly blackface special, called The Black and White Minstrel Show.Look how the BBC cover this story.
A Republican Senator who was a co editor of a 1968 College Yearbook, which showed an image of a student in Blackface
'Golliwogs' and so on was a thing. It's just another way of making white people feel guilty, based on fictional "racism".
They managed to make those who outed Trudeau as the bad guys, with some clever editing.