Bull-fucking-shit
The whole thing with the Khadr family is very, very complicated, and not amenable to easy answers, but I do know this: this suit is bullshit. It's the exact moral equivalent of suing an American solider's father because he had passed on his values to his son, which caused his song to go and kill people. I think Zaynab Khadr's comments at the end of the article are pretty damn accurate.