You guys know what? Don't sweat the small stuff. Let's approach this issue from a first principles perspective - the Elon Musk angle:
The climate is taking serious damage from our use of fossil fuels. Because it will take some more decades of even centuries for humanity to become multi planetary (working on that too with SpaceX) it's really important that we switch to sustainable transportation (Tesla) and energy generation (Tesla Energy) on Earth so we survive the interim period and don't destabilize our civilization more than necessary, as this will slow down progress on the Big Goal: becoming a multi planetary species.
Now, does anyone really think it matters where the money comes from for Elon? I mean for him money is just a means to an end. He cares not about accumulating wealth but only about money as a tool to make progress. Of course Elon has little regard for backwards Arabian wahabbi tribal Muslims. Just as he has little regard for greedy Wall Street bankers, for crazy Christian Republicans, for Democrat corrupt politicians etc. In the future he envisions there's no room for religious bickering, for nations playing zero sum political games, for war, for short-sighted greed, for FUD-slinging etc etc etc.
A hundred years from now who's going to remember where the money came from? Who's going to remember the last name of the warlord who happened to be in control of Riyadh when the oil was found? Who going to remember Trump's antics? Who had the biggest fortune in 2018? Sure, it will be there on the history books, but it won't be important. Just as it seems to us now just a detail in a history book who happened to sit on the English throne in 1745, or what flag was on the flag pole in Constantinople in 1857, or how many people were killed in the Russo-Japanese war of 1905 and what territory was claimed and lost in that war. But a hundred years from now every child will still learn about Newton, Einstein, Neil Armstrong, and most definitely about Elon Musk. And hopefully they will do this neither as Muslims, Christians or atheist nor as Americans, Germans or Saudis but rather as humans who live in a global, multi planetary, well coordinated, peaceful, rational and compassionate civilization without nation states, without economic incentives for war, perverse incentives, manipulation of others, oppression, destructive behavior toward fellow humans or nature for short term economic gain or for power.
Don't get hung up on the insignificant details. Let the man do his thing.