I asked abc why he listed me and he tried to explain that it “somehow happened” which I did not understand.
Facebook will make assumptions about people you may know based on the fact that they are friends of friends. For example, I am friends with two cousins of mine (they are sister and brother to each other). They are both friends with their mother. Since she and I have two friends in common (her two children), Facebook assumes I know her and asks me if I want to be friends with her.
The truth is, I did know their mother, but she and their father have been divorced for almost 30 years. So no, I don’t want to be friends with her.