On the other hand, we do already have evidence that there are individuals who get a job at Tesla with the sole goal of getting them to unionize and no motivations actually wanting/needing the job.

Are you asserting that union activists are related to a short short seller conspiracy, or are you just suggestively placing those next to each other and hoping that people draw a sinister conclusion?

Union activists join tons of companies to try and unionize them, because get this, they’re union activists. They think unionizing labor is a moral imperative, and so they act as such. You might not like it, but it’s hardly unique to Tesla or a big dark conspiracy.