There are two types of controversy. With one, a genuine conflict of genuine principle is involved. You may abominate the stance taken by the other side, but it at least possesses the validity of being a stance. Consider, for a current example, the debate over "don't ask, don't tell". I personally regard DADT as offensive and discriminatory, and believe it should be repealed forthwith. But those who think otherwise have at least an argument to make. Their argument may not be persuasive, but you can nevertheless acknowledge its existence as an argument, and acknowledge that reasonable people might differ. Indeed, over time, some reasonable people have even managed to differ with themselves. Like Colin Powell: In the '90s, he felt that unit cohesion, a subject he might be expected to know something about, would be undermined by the presence of gay soldiers in the ranks. In the years since, he has come to feel differently. Serious people can debate the point. They can also debate the underlying question of whether the desirability of unit cohesion trumps the mandate for equal treatment under the law. It's a valid debate, even if we've gone through it already. The same argument was heatedly joined in the months before Harry Truman settled the matter by integrating the armed forces with a pen stroke.
But there's another kind of controversy, the fake, ginned-up kind. The kind where all the respectable argumentation is restricted to one side, and on the other you find only prejudice, demagoguery, and vague, inchoate anxiety. You can usually identify examples of the latter fairly easily by the transparent vacuity and illogicality of the arguments adduced by one of the sides, along with flagrant misstatements of fact. Such positions aren't merely unconvincing or mean-spirited or repellent. They literally don't survive scrutiny.