The most obvious is that genocide or even mass killings are difficult to countenance as the twentieth century comes to a close. The second is that conflicts can spread, and conflicts in Europe could spread quite rapidly. Moreover, there is something special about Bosnia and Kosovo. Both involve Moslems in conflict with Christians. Not seeming to care about the fate of Moslems being persecuted for their faith may bring other and less welcome intervention.
Refugees are an increasing problem in the world.
Many are seeking to escape conflict. Substantial numbers are admitted to Canada, at some considerable expense. More money invested in the first place in creating the conditions that prevent the conflict which produces the refugees might save money. The world is a messy place and that is not likely to change for a long time. Even though no one threatens Canada today, that does not mean that no one will.