it's just more thuggery
These are the same people who keep demanding that Americans and Brits and Europeans lower their quality of living, that we consume less high-quality protein, go back nearly to the dark ages of transportation, that we should not defend our borders or limit immigration, or defend our privacy and property. No, they insist, we should turn most of our life decisions about food and career and liberty and living space and health over to government thugs who will force us to comply with "infill" (i.e. over-crowding) regulations, and then complain about SOME of the effects of over-crowding, like water quality, while leaving others unmentioned and pointedly ignored. The problem is that we have too many people, packed together too closely while respect for individual rights is being actively reduced.
Ethanol production does not require diverting food. The process leaves nearly all of the food value in a form such that it can still be used as cattle feed (and probably even made into fake burgers and sausage for the vegans).