It's easy to blame BH because his job is on the line. But that's not really being honest about the incident is it? That's just going with the flow of things, and tbh - being on a bandwagon.
I think it's seriously clutching at straws to say
"his only hope was that Stroll could maintain enough car control to leave both of them enough room". This logic applies to every pass ever made. Every single overtake in any motorsport requires the driver being overtaken to not crash his car into the other one.
Also
"so much of the race left". Well with overtaking as difficult as it is in F1 (and as difficult as it proved in Montreal), a real racer would take any chance they would get to make a pass rather than say "maybe it'll come up later".
The accident literally would not have happened had Stroll not run out of talent. From Strolls point of view, he was not hit, he did not have a puncture, and the fact another car was alongside him didn't matter. He ran out of talent and was on his way to the wall and just happened to collect BH on the way there.
From BHs point of view, he left Stroll room, was not on his way to an accident and was setting himself up to be on the inside for the next corner. Literally, the only thing that would've stopped it working was Stroll running out of talent at that very moment...and that's what happened. You cannot decide to not make passes just in case the driver you're passing has a crash.
If BH is at fault for simply being near to Stroll when Stroll decided to have an accident, then I think we need to re-evaluate our opinion of Maldonado. It wasn't
his fault that everybody just happened to be near him when he was having crashes! And that guy Grosjean - others should just avoid crashing into him whilst he's spinning wildly across the track. He can hardly be blamed for others not avoiding his antics!
It's a strange day in motorsport when the guy getting caught in someone else's accident is just as much to blame as the guy who caused it, literally, on his own.