This is a strange looking photo.
Upon looking at it for a longer period, I think that it is quite a strong image that, as you mentioned, evokes deep emotions within us. I think it is the assosiations of being behind a fence, a barrier or just on the other side.
The glove looks very innocent and harmless. And I think this is why it is so powerful. Why would we need to keep it so seperated from the rest of us?