I think we hear the term "unconditional love" and each of us has a slightly different idea of what it means.
When I hear it, I envision some longsuffering soul who is biting his/her lip while encountering soul-devastating treatment and never speaking truth, never suggesting to the unconditional love recepient that their behavior or attitude is harmful, etc.
I perceive that as harmful for both the giver and reciever. The love-giver continues to take in damage and continues to keep making themselves vulnerable to be damaged. The love-recepient continues along the path of unchallenged self aggrandizement with little concern of the impact they are having on those around them and never being presented with an opportunity to grow.