I'm a Ph.D. candidate in social sciences and last month I presented and defended my thesis in an Eastern European university. The full text of my thesis is available to the public. A couple of weeks after my defense, a math professor from the U.K. wrote a blog post in which he utterly misrepresents my results and suggests that my work is pseudo-science. His opinion does not deal with statistics or any other parts that may be a common ground for mathematics and social sciences. When I tried to publicly defend my work on his blog and to point out that his claims are malicious and untenable, he accused me of homophobia, implied that I am a psychopath, and said that the methods I'm using have driven people to suicide (none of which is true, but rather nonsensical - I had a serious WTF experience when reading these claims).
All of the above happened on a niche blog that is widely read among my colleagues, and I fear that it will affect my career as a researcher. Some signs show that this may have already happened. I want to file an ethics complaint against this professor at his university and I would like to hear whether the above are sufficient ground for such a complaint. Do university ethics committees dealing with other cases beside research misconduct and harassment? Should I present this as a research misconduct case or as something else? I feel that this belongs to presenting flawed interpretation of data and misrepresentation of qualifications or experience which is not held (a math professor thrashing social science research), but I do not think that a blog post would qualify as 'research' at all.