The skeptical viewers provided a detailed explanation on why they think this is a fake. If the image is already manipulated to a new setting, what else is being manipulated? All you are doing is personally attacking anyone that questions the authenticity of the photo. Your attacks do not make the photo what you want it to be. It is either real or not and you have not strengthened any technical claim towards the authenticity argument. All you have done is made Ad Hominin attacks on two different individuals on this thread, one based on their geography and another based on their technical skillset with a computer program.
Sam himself, if he cares to follow-up on the link to this thread, will be able to signal if it is authentic with a DCMA. Same with the other unauthorized content on here.