Every relationship of domination, of exploitation, of oppression is by definition violent, whether or not the violence is expressed by drastic means. In such a relationship, dominator and dominated alike are reduced to things- the former dehumanized by an excess of power, the latter by a lack of it. And things cannot love.
With the establishment of a relationship of oppression, violence has already begun. Never in history has violence been initiated by the oppressed. How could they be the initiators, if they themselves are the result of violence? How could they be the sponsors of something objective whose objective inauguration called forth their existence as oppressed? There would be no oppressed had there been no prior of violence to establish their subjugation.