Did Martin Luther King, Jr. make only a positive contribution to society or was there negativity as well?

I think that it is very difficult to make an argument that
Dr. King did anything but make a positive contribution to society. One can argue that
the damage that he did was to institutions and individuals that supported and advocated
racism.  Dr. King was able to transform the struggle for Civil Rights for people of
color into a human issue, on the same level that the framers of the nation were able to
conceive of the struggle for independence from England as a struggle for human
independence.  Dr. King was able to do this by invoking the idea of dreams and hope,
calling for change through active resistance and dispelling the call for violence, which
probably puts him on a higher moral and spiritual level than the framers of the nation
who openly called for war.  In creating "the dream" of equality and freedom, Dr. King
was able to appeal to people of color, but his reach broadened to all of those who
experienced marginalization, providing a vocabulary for "the other" to speak of being
included and eliminating the practices of silence.  Dr. King was able to give the
vocabulary and language to those who seek change and offer a vision of how society
should be as opposed to how it is.  In this light, I can only see positive contributions
that he gave to the social fabric of the time period and all that was to
follow.