From a psychological perspective, this overreaction to one very salient (and very sad) accident is nothing new. It is a consistent way that we react to salient news, and it is perfectly irrational.
And after all of this, my suggestion to you? If you had decided to buy a Tesla before this accident, get one now—because the event didn’t add much to the information you used to make your original decision. In fact, given that other people might have an irrational fear of buying a Tesla, maybe the prices will go down a bit.