[SwedishExpat]

> The point is that it's not Tesla's employees that are behind it.

How do you know this though? Union membership is anonymous. You have no reason to tell your employer you're a member. If there's a strike all employees can legally take part to help stop identification of members. Every member of Tesla could be a union member saying they aren't to avoid pushback by Tesla. That's just as likely as none of them being a member.