I suppose for many Canadians it's the issue of the Khadr family (including Omar) as Canadians that is a bit fraught. 

 In the letter of the law, they are Canadians.  

In the spirit of the law, it seems - based on their terrorist associations  - this family are Canadians only because they got canny enough to get their citizenships and make the best use of them, while consorting with enemies of this country.  If one of the big issues of the day is immigrants embracing Canadian 'values', this family is an example of a massive failure on that front.

So however wrong it was to keep a boy - of any nationality - imprisoned like that for over 10 years - I suspect it's the repeated insistence on Omar Khadr's Canadianness, that rankles some Canadians, especially I suspect those who've served and got wounded in battle for Canada.  An apology perhaps, but the $10.5 M seems too much for many.  The Liberals are now having a serious optics problem as a result.