It doesn't matter. No matter how convincing your argument is, we can't afford to risk the entire world on you being right. The stakes are too high. And I think

It doesn't matter. No matter how convincing your argument is, we can't afford to risk the entire world on you being right. The stakes are too high. And I think you are very wrong. Aliens don't need to be anything like us. Don't anthropomorphize them. They might have nothing like our morality or care for other sentient life forms. And just see us as a pest and potential future competition to snuff out. Or if they do have morals, they could be completely alien. When the Europeans discovered the New World, one of the first things they did is try to forcibly convert the natives to their religion. They justified conquering and ruling over the natives to stop their savagery and impose their values and laws on them.