In other words, this Tesla person is confirming the no-brainer that the behavior of buying a Muskmobile is not statistically independent of the behavior of being a dickhead on the road.
"Our cars are incredibly safe. It's just that some of the idiots who comprise our customer base are more dangerous."
I don't buy the part about driving conditions, because when you're looking at national level statistics from everywhere, everyone drives the same damn conditions. Conditions can only explain one particular accident. Or a string of accidents at a particular intersection.
Maybe the study is flawed by incorrect statistical analysis when combining two disparate data sources (FARS and iSeeCars mileage estimation). I'd really love to see where the non-hybrid Honda CR-V ranks compared to the hybrid CR-V. Same for the Hybrid vs. non-Hybrid Corolla. Also a rough sanity check would be the fatalities for each vehicle model divided by the total number sold of that model.
But my gut feel is that there is a systematic bias in the iSeeCars mileage data that they aren't properly accounting for (say prevalence of leasing EVs skewing the mileage estimates).