Because he has made some very powerful enemies. SpaceX encroached on ULA's turf in the military satellite launch business with a vastly more cost-effective solution. SolarCity is making energy utilities across the country nervous because it threatens their monopoly (just read about the so far successful push from Buffett's NV Energy to stop the advance of distributed solar in the state of Nevada). Tesla just sent Detroit into catatonia with the Model 3 launch and their (almost sure to be a) half-million reservations for a car that will exist only in two or more years.
None of these forces will go silently into the night. This feels like a deliberate, coordinated attack that hits Musk personally, and all three of his companies at once.
Elon Musk wants to tackle climate change, build safe open artificial intelligence and go to Mars...
WSJ was also super-negative on Theranos, just to throw it out there, as tech press was being busy singing accolades to yet another unicorn.
Conservation as a general concept is about preservation, tradition, limiting change. I'm sure there's plenty of people who align with conservative values for other reasons (as I'm sure most don't have a problem with Elon), but that doesn't change the fact that a lot of people are opposed to change in general. They like the way things have been and the way things are. They have a good thing going. They don't want to risk a future they might not like. They don't want to have to learn a new future. They don't want to have to worry or think about learning a new future.
Hell, I get it and I consciously chose to go in to web dev! I can find out about a new tool that will make my life easier and still have an initial reaction of "damn it, not another one!".
Elon Musk is the symbol for a lot of change.
>I wonder why WSJ and conservatives set a target on Elon.
"WSJ has a target on Elon Musk's back. Every week they post something negative about him or his companies. I have a couple of WHITE friends who have an irrational hatred for Elon. They rail how everything Elon Musk does is a "scam". The WSJ comments are a reflection of that mindset. More broadly, I wonder why WSJ and some WHITES set a target on Elon. There are literally a gazillion subsidies, tax credits, offshore accounting going around. For example, Hollywood shoots their movies wherever they get tax credits. Texas has attracted large back office operations using tax credits. Data center locations are chosen based upon which state government throws in the most benefits. It seems odd that they would spent so much energy on Musk, whose subsidies are probably a rounding error. It makes me wonder if there are bigger things at stake. Are the WSJ overlords really scared that he is making material changes to energy and transportation that could hurt them ?"
Or that if Tesla issues more shares for capital, Elon Musk is the primary buyer.
Or that if there really WAS a costly issue that made the shares plummet, they will plummet further when he gets a margin call.