e.v. drive weird.

Because they are very different machines on the same road :
in internal combustion engine vehicle, going downhill : let's accelerate a (little?) bit !

The electric car driver :
(slowing down) let's charge the battery !

There are approximately 250 million cars on the road and they only used data from 8 million? That's 3% of cars on the road to extrapolate into all the cars on the road. Seems like a huge flaw especially since we didn't know how they got that subset. All seems like click bait as most articles related to Tesla are...

Another good way / better way to see what cars are dangerous are insurance rates. Since insurance companies take in way more data than 8M cars when determining rates.