I'm of the opinion that it was a freak accident, but let's not pretend that there haven't been former professional players who have stated that this was an event that either had malicious intent or, at the very least, was reckless.
There's nothing to indicate that this was premeditated in any way. It looked like a defenseman who was intent on making contact with a big hit around the blueline, but unfortunately, had his skate clipped by a teammate, which caused the blade of his skate to be as high as where it was. I can see why so many people would believe that this was a deliberate act by watching the video. That being said, the game of hockey is played at such a fast pace that hits and a freak accident like this can look calculated. That's just my perspective of what happened.