No, my native Finnish is not related to the other three (which are all Germanic). To take your example, as far as I know there's no difference in the respect I

No, my native Finnish is not related to the other three (which are all Germanic). To take your example, as far as I know there's no difference in the respect I feel for people when using a language where the courtesy form of "you" is basically mandatory (German), archaic and basically never used (Finnish), or non-existent (English). Now, maybe there is some effect there that I can't notice that could be ferreted out with some psychological experiment. But the original claim that everyone knowing more than one language would implicitly be agreeing with the article is just not true.