Sympathy and Suffering

While Hume, the earlier Smith, and Schopenhauer, are among those who recognize Sympathy as the basis of Morality, the later Smith, Spinoza, Kant, and Nietzsche, are prominent opponents of that principle.  While the primary objection of Spinoza and Kant is that Sympathy is a passive condition, Smith's and Nietzsche's concern is that to share in someone's suffering is to become weaker.  Unaddressed in all seven positions is what the physician understands--suffering needs to be alleviated, not either shared, ignored, or resisted.  So, the prominent opponents of it miss that Sympathy is neither a necessary nor a sufficient condition of Morality.