I think the main problem in Canada in respect of this and the Coffee Flight bombing is the contrast between the reaction of American forces (for instance, the adding of the four Patricias killed by Coffee Flight to
the Fort Campbell Memorial of the 187th Inf in Kentucky) and their political leaders - I think a lot of Canadians felt the White House should have been more contrite about the incident.
Issuing a statement via the Ambassador might do elsewhere but when you're relying on Canadian co-operation to maintain border security, NORAD and extradition arrangements and considering the thousands of citizens who live in each other's territories and the number of Canadians serving in US Forces, a more fulsome apology would have been welcome.
However, since the WH doesn't want to acknowledge US casualties I suppose it's too much to expect them to acknowledge Canadian ones.