Minor injuries I would imagine includes small cuts and bruises, you're not going to suggest that requires a div, are you?
As for the broken ankle pax, is it not true that you can't fly for a number of days after a cast is fitted due to the possibilty of the limb swelling? I'd reckon the pax wanted to get home and if they were going to require hospital treatment they wanted that to be in a hospital at home, rather than being stuck in a canadian hospital for a few days.
Funny how people are so quick to criticise, especially BA, on this forum. The simple fact is, I haven't heard any reports of the pax or crew criticising the decision to continue, so why should anyone here criticise?