Full Idea
A duty of free respect towards others is only a negative one (of not exalting oneself above others) and is thus analogous to the duty of Right not to encroach upon what belongs to anyone.
Gist of Idea
Respect is purely negative (of not exalting oneself over others), and is thus a duty of Right
Source
Immanuel Kant (Metaphysics of Morals II:Doctrine of Virtue [1797], 449 I.II)
Book Reference
Kant,Immanuel: 'The Metaphysics of Morals', ed/tr. Gregor,Mary [CUP 1991], p.244
A Reaction
Not good enough. He seems to think belongings are the main issue. By referring to one's own modesty, he has no way to indicate equality of respect (among races, ages, genders, religions, animals etc). Being humble does not entail being respectful.