Is emotion the killer of sound logic?

Reading many of the responses to this question, it seem to me emotion is more powerful than sound logic. I can say I have witnessed it on several threads at least. I was not always a part of it but lurking in the shadows watching the duel go down. ”Jellybelly” will make a statement or ask a question that he/she really believes is pertinent, like “birds do it and bees do it, so why is doing it different than that natural, right etc?”_ Then ”Jellyjam” instead of analyzing the question or statement and logically coming up with some logic, facts, etc to equal, or debunk the statement Jellybelly made, Jellyjam will just come off with a kneejerk response accusing Jellybelly of being this or that and attacking his/hers intelligence. There are many “for instances”, similar to that where emotion totally bypasses logic. With so many highly educated and near geniuses on Fluther, is emotion their kryptonite? No matter how smart and intelligent you are can you be undone and hobbled by emotion? Why cannot superior intellect stand up to emotion, but often caves under it?