Logic is all there is. Every emotion must be tempered, contained and controlled. All emotion is suspect, real, but suspect. It is certainly better or at least, more productive to engage others in a positive, cooperative way than in an adversarial one, but only because it s generally more constructive or profitable. In other words, because it makes logical sense, not because it feels good.
Emotions are suspect, because they change with our moods.
Love, anger, sympathy, fear, are all merely chemical changes that we interpret subjectively. We re happy when things are going well, sad over losses and angry when things go badly for us. Emotions allow us to be swept away by life, reacting to things instead of taking responsibility for ourselves. An emotional outlook allows us to blame others for making us mad, or making us happy, when only we can do those things by the way we interpret facts and circumstances. Emotion is an unreliable and unstable indicator, because feelings are fleeting and transitory.