As believers of Christ, we should aspire for truth in every relationship, not simply to win the debate. Winning, however, is only truly achieved by gaining a comprehensive knowledge on a matter. An honest man, or lady for that matter, should not think that he is whipped like a dog that has been beaten, when coming to an agreement with another man on an issue. Truly, a victory of sorts gaining the truth. It is quite disingenuous to disagree without a set of truthful facts, rooted in a Biblical proposition.
Emotions certainly have there place in our lives.
After all, Almighty God has emotions. Mankind was created in the image and likeness of God. The LORD God, of course, knows everything completely. Therefore, HIS emotions are never out of kilter. If one fails to give Scriptural reasons for his conduct, conversation, and concepts, then his dissenting is simply an expression of personal, subjective, opinions.