I think all "TRUE" longs would vote with Musk against a hostile takeover. Of course, others may disagree with my definition of a true long.
There is a reason people have been frustrated with even trying to get resolutions passed at the annual shareholder's meetings. Because when the board votes one way, they pretty much move the entire company. If I am not mistaken the Board (including Elon) owns combined 50% or more of the company. Keeping in mind that people like Steve Jurvetson have their own investing arms which is what invested heavily into Tesla in the early days. Since Steve owns this company, he is not going to let those shares be voted against his wishes. These count toward the "institutional" owned share percentage as opposed to "insider" which is less than 30%.
So the only hope of a company doing in Tesla isn't from the inside, but externally. That is a far more costly prospect, but it would be possible.
1: Pay off politicians to influence public policy away from electrics (I can only see this being effective by either raising a false flag of "hope" toward something like... I don't know Hydrogen... thankfully that is mostly failing right now. The other is by removing all influence toward electric adoption... that ship has mostly sailed at this point though, so I don't see this working well in major locations.)
2: Buy up any and all patents and bury them away so they can't be used (This has been happening for a *very* *very* long time. Thankfully better batteries is currently the major influence of things like consumer electronics and you don't want to piss off a trillion dollar industry to protect your own trillion dollar industry... you will get people on Tesla's side since it will be more of the Enemy of my Enemy is my Friend sort of thing... So I don't see that happening)
3: Influence Tesla's suppliers to break deals with them (it has been speculated that this might already be happening on some level. Tesla has shown that they are willing to overcome supplier issues by just bringing that part in house. You won't make my seats for me? I guess we will make our own! This is failing, if it is happening).
4: Sabotage (This is some conspiracy level, grassy knoll, fake moon landing, level stuff... That being said, buildings are insured, and as much as it would hurt to lose a key member such as Elon or JB, there are a LOT of smart people at Tesla. At most you would slow them down... this ship has already sailed and the window is no longer there.)
5: Real Competition (Uhhhh, isn't that a win for Tesla? Big Oil would never support this to overthrow Tesla as it would still end with their downfall.)
I can't think of anything else as external threats leveraging endless pockets of cash... but most of these are either no longer an issue, or would at most, just slow Tesla down... The cat is out of the bag, and there is no putting that genie back in the bottle.