1) So race relations have not budged since the mid-80's? Maybe update your "teaching": materials, more than 30 years have gone by and a lot of change has taken place. This invisible backpack thing is badly out dated.

2) If a teacher can shut up a white male with an insinuation straight out of Kafka's The Trial, then...what power/privilege exactly does this white male have? What systemic/institutional power is the white male using here? He is silenced, and powerless to even state an opinion. Where is all this power he has? Power is contextual, no one has all power all the time. 

3) The black population of Canada is less than 3%.  White population is 80%.  Maybe, just maybe, white people have so much representation because they are the overwhelming majority. This is just a fact. There's no malice, no grand conspiracy....unless you are so racist as to think that white people are having and raising children simply to spite and hurt minorities.