1. The traffic lane the victims were turning into is in addition to the ending freeway's traffic lanes (i.e. it is one lane further to the right than the right-most through lane). So someone had to be crossing lanes one way or the other for the collision to occur in the first place. Maybe not, I am not a traffic expert or familiar with the area, but that is how it looks to me as an experienced driver.
2. If "Autopilot" was engaged why didn't the Tesla react to the obstruction? Perhaps the timing was too sudden and it didn't have time to reach before being smashed to pieces?
3. Was the victim driver tested for intoxication? Perhaps they were not following all traffic laws as well? Sometimes accidents are the culmination of multiple drivers' mistakes. Not trying to victim blame though. May they RIP.
I think it is clear the Tesla driver was being reckless here because of the speeding. It is unclear if he ran the red light or not. I'd say at the very least revoke the guy's license permanently.
Tesla is, to me, clearly reckless as well with their marketing tactics and their failure to tamp down unrealistic expectations and the hype-machine surrounding "FSD".