Is the use of food, in particular, corn, as a source of fuel a manipulation by the Extraterrestrial Alliance to foster misuse of farmland, raise costs, and reduce energy efficiency?

You have nicely stated the problem and the answer within your question. The use of corn as a biofuel to generate ethanol is wasteful on many accounts. It not only diverts food that could be useful, it commandeers scarce farmland for non-food production, and that too comes at a cost and misdirects human capital at a non-problem. The fuel generated is less efficient, so it ends up being a mixed result in the end where the adulteration of gasoline with alcohol is marginally cheaper when oil prices are high, but becomes more expensive when oil prices are low. In addition, being less able to generate the same level of energy on a weight or volume basis, more of ethanol-containing gasoline is needed to travel the same distance relative to pure gasoline as a fuel, so it is a false economy under ideal circumstances. This is engineered to be so, and is a kind of folly that defies logic, and is supported wholly by mind control manipulation to overlook the nuances and to actively avoid coming to sound conclusions and even to manipulate underlying data about cost benefits. This is all a hallmark of Extraterrestrial Alliance mind control manipulation to cause entire industries to pursue something that is nonsensible on its face, but achieves widespread political support and takes on a life of its own and will be continued far beyond the point when most people see through the scheme, but must write this off to something outside their control and not worth complaining about—because who would listen? This complacency is endemic throughout human culture and is a major reason all this goes on unopposed, except by a few who are simply ignored as they have insufficient power to truly influence things.