Opprobium

When one has a visceral dislike for someone else ... be it a politician, a celebrity or even a neighbor ... then, depending on degree of emotion, one will often amass a parcel of reasons to justify this opprobrium ... many having nothing to do with the original aversion. 

And the same layering of rationales occurs in reverse ... as a result of an infatuation. This suggests that our emotions too often have a leash on our logic ... and this is a flaw that keeps pulling mankind down.