I think the blame is Montoya's. They were behind the safety car, so they weren't racing. The safety car wasn't near the pull-off point, so they weren't about to be racing. So if those two drivers were not racing and not about to race, what justification does does Montoya have trying to pass Schumacher (one possibility) or following him so closely that he couldn't avoid (the other possibility).
Montoya is blaming Schumacher, saying he "brakes so hard" on warm-up laps and that he shouldn't have braked "after a zone of massive acceleration" (I'm getting this from
www.f1live.com). Well, since he knows Schumacher brakes so hard on warm-up laps, he should anticipate it. And how can you have "massive acceleration" behind the pace car that can't even go fast enough to keep the F1 tires up to temperature?
I've also heard arguments that the tunnel was dimly lit and the curve is blind. Well, given that you could see what was going on via the TV cameras, I guess it wasn't that dim or that blind.
So, bummer for Schumacher and another woe to add to McLaren's list. As they fix the wonky motors, they'll get the wonky driver.
That said, I was hoping for Schumacher to lose soon - I'm a Ferrari supporter but, face it, the season was getting to be a snoozer. I'm delighted for Renault and BAR. I do still admire Montoya for his aggressiveness - he actually passed someone at Monaco. And I'm looking forward to the Nuburgring and praying for rain . . . now if Mark Webber can finally catch a break (like a Williams ride), I'd be really happy.