one does not exclude another. ukrainians are a result of russian colonization of the areas taken from poland and ottoman empire. turkic presence is generally due to people from latter of those (namely cossacks, whom ukrainians fiercely masturbate to), while a semitic one is because of pale of settlement, which contained up to 3/4 of all jews in europe. because of that, those mutts were one of destabilizing factors in russian empire. when given self-governance after ussr, they just went all out on it.
Russian Federation