Tesla's mission is to accelerate the adoption of renewable energy sources. This doesn't directly counter that. In fact you could argue that pushing the world to rely on massively energy-inefficient proof-of-work rather than a centralized authority for trust in the financial system is going to make the need for renewables even greater.

If (and it's a big if) we can get to 10% renewable energy in the next decades, Bitcoin's energy consumption will be much less of an issue.