Quoting from the article you linked to:
The study goes on to report that dealers appeared to ultimately be dismissive of electric cars or even completely avoided talking about them entirely. When the dealer did talk about EVs to the customer, the information given regarding vehicle specifications was often wrong or geared toward swaying the consumer into purchasing a fossil fuel powered vehicles.
While I'm perfectly happy to participate in dealership bashing -- I think most people hate the hassle of haggling with a salesman who is interested in parting you from as much of your money as possible, not finding what's best for you -- to be fair, there is a good reason for legacy dealership car salesmen to talk up their gasmobiles and not their EVs; a reason that isn't part of any evil conspiracy to keep burning fossil fuels and keep adding to global warming. The problem with a salesman promoting an EV is that to persuade the customer that an EV is better than a gasmobile means denigrating all or nearly all of the other cars he's selling. So, if the potential customer decided he'd rather not have that EV, then the salesman would be faced with the task of trying to convince the potential customer that everything he said about gasmobiles didn't matter.
* * * * *
CAR BUYER: So I've heard about this Bolt EV, but I don't know much about electric cars. Can you tell me why those are better than gas-powered cars?
CHEVY SALESMAN: The Bolt EV, like other electric cars, is cleaner; it has no harmful or polluting emissions, and in fact has no tailpipe at all! The electric drivetrain gives you instant response and acceleration when pulling away from a traffic stop, even better than the most powerful gas-powered sports car. And they are very quiet, with almost no noise at all from the electric motor! You can conveniently charge them up at home by plugging into the wall, saving money over buying gas, and no need to visit the gas station every week.
CAR BUYER: Well, I don't know. Electric cars are such a new thing, maybe I'd better stick to a gas-powered car.
CHEVY SALESMAN: I can put you into a new Equinox SUV or a Malibu sedan today! Or if you'd like something sportier, we've got the top-rated Corvette Grand Sport and Corvette Stingray.
CAR BUYER: But didn't you just say that gas-powered cars are sluggish? Not to mention polluting, noxious, noisy, dirty, and inconvenient?
CHEVY SALESMAN: Ummm... well, that is...