The motive-hunting of motiveless Malignity

From the marginal notes of Coleridge's copy of Othello: "The triumph! again, put money after the effect has been fully produced.--The last Speech, the motive-hunting of motiveless Malignity -- how awful! In itself fiendish -- while yet he was allowed to bear the divine image, too fiendish for his own steady View. -- A being next to Devil -- only not quite Devil -- & this Shakespeare has attempted -- executed -- without disgust, without Scandal!"