The school should let children see more video about Canadianes hunt on seal, Japanese hunt on dolphane and whale.
No matter what is the starting, the result leads to a race discrimination, then it is a discrimination. There is malefunction of the school or teacher. You should make an complain about school to the school board and the ontario human right committe. You should require the school play an video how the chinese labour built the Canada road.
Do not be stupid any more. No one is pure, no race is pure. If you do not understand this and defeated by the western culture who darked the chinese, you are not a good parent. Even if you admit guilty, they will look down upon you and all your chineese offsprings.
Love your son and love chinese blood. find something to give your son a reason to live on.