This is not all about the Tesla fuss. This has already been an issue long before Tesla somehow joined the Bitcoin community by accepting Bitcoin and eventually removing it. 

Green mining is much better and cheaper. So it would be beneficial for miners to choose them over other nonrenewable energy sources like coal or fossil fuels.

If you use the sun as your energy source, do you have to pay for it? Of course not. So it should be an additional advantage to your operation. If you use the wind, do you still have to pay for your electricity? Of course not. So that should mean bigger profit.