But you can't blame them for wanting to carry on the race with only 3 laps left

especially as with the debris alone they left behind on the first contact the SC might have been deployed...
Kubica though did have the position when Vettel braked though they were level at the point of contact... Perhaps Kubica thought he had the line.....
Anyway I'd give it 50/50 as Vettel was also at fault for carrying way to much speed when he was off the racing line