In my opinion you can lie with statistics very easily to support your thoughts or positions. I would encourage Jim to seek a bashing position and short the snot out of Tesla stock. I would love it if he would short 50 million shares of it.
Just because he's negative that doesn't necessarily mean he's short. He very well could be short and I'm not trying to say that he isn't, but being negative in and of itself is not definitive proof of someone being short. And even if he is short, who cares? If someone has justifiable negative information or insights I want to hear them; it's up to the reader to determine the validity of the information presented. He has yet to post anything that has adjusted my opinion of REG in any way but if he posts something of value I will most certainly take it under advisement.