Based on the excerpt below, why did Jefferson believe that the passage of the Missouri Compromise would deepen sectional conflict?
"“This momentous question, like a fire bell in the night, awakened and filled me with terror. I considered it at once as the [death] knell of the Union . . . but this is a moral and political, once conceived and held up to the angry passions of men, will never be obliterated; and every new irritation will mark it deeper and deeper . . . the cession of that kind of property, . . . would not cost me in a second thought, if . . . emancipation . . . could be effected . . . but, as it is, we have the wolf by the ear, and we can neither hold him, nor safely let him go. Justice is in one scale, and self-preservation in the other.” Thomas Jefferson’s response John Holmes to the Missouri question 4/1820"