Citron's entire business is shorting investments and then trying to cause a panic with negative PR to move the market in their favor. It is shocking that what they do is legal. This doesn't mean they are wrong here, but I wouldn't describe them as a trusted source either.
What is legal about it? Buying a stock and releasing positive PR sounds a lot like pump and dump which is illegal. Is it just the fact that they are shorting the stock that makes what they're doing legal?