Though this can be perceived to be philosophical in retrospect, it is a valid behavioral question.
I contend that hate is more dominant. In observational research, not sanctioned, just in the world of social media, it seems that even the most benign of posts, say a yellow kitten, can become fodder for hateful attacks against others.
Is it that we live in the world of anonymous responses, or is it that hate is truly the more dominant emotion?
I am considering my dissertation topic, and believe Love versus Hate in social media would be a worthy topic for research.