For a couple days, news of Nikola being fraudulent were all over everywhere, and when I finally clicked on the link, it's from... someone who is obviously shorting the stock. Every short seller ever tries to convince everyone that the companies they're shorting are doing all sorts of shady stuff.
In this case, everything in the report looks legit, but the number of people credulously citing this report without anyone mentioning that Hindenburg has a massive financial incentive to have Nikola implode has been surprising.