They're both likely true.
Unions, conventional automobile companies, and the oil industry are all terrified of electric cars. EVs mean less jobs, less parts, longer renewal cycles, and of course removing inflexibility from oil demand. EVs threaten industries collectively totaling trillions of dollars and in some cases even double digit percentages of nations' GDPs. It's absurd and naive to think these industries would do nothing.
... but Tesla is a corporation, and corporations act in their self-interest. Corporations (and governments and other large entities too) routinely omit negative information, cook their numbers, ignore problems, over-reach, and generally push boundaries in their race for profit, power, and status. As good as Tesla's mission is, I don't necessarily expect it to behave better than a standard issue corporation.
Conventional auto industries only implemented safety in vehicles and in factories after being repeatedly whacked upside the head. They still don't hesitate to ignore safety overseas when they can get away with it, nor do they hesitate to destroy the economic well being of entire regions of the country to save a bit on short term costs or flout environmental regulations.
Tesla is new, so they'll probably need to get whacked around a bit too. But I still hope they are successful because their mission is good for humanity in the long term. Continued reliance on oil is an existential risk to the human race.