We all like to believe this, but practically it’s not always true. With enough resources you can make a significant part of the population act in your interests and against their own. Now I won’t get into the argument that each and every soul is able to reason and defend their interests at all times or whether if they did what you pushed them to do, it’s because your interests were in fact already aligned, there are countless examples to the contrary.
So if you, as a foreign entity, can exert your will on a democracy this directly, yup, I’d ban you.