Actually the qliphothic tree runs up parallel to the... human tree? like turning a page upside down and drawing on the back.
There's actually quite a bit of dualism in Judaism, starting from the first letter of the Torah, Bet, which is numerically 2. Following this we have Tohu and Bohu, Waters above and below, Man and Woman, and the tree of Knowledge of Good and Evil. Unity is a big part of Judaism; so is Duality. Understanding how they work together (the duality of unity and duality) is one of the great philosophical questions that Kabbalists, Chassids and Masters of Mussar struggle with.