Are 'identity politics' good politics?

Normal politics presumes that we can rise far enough above our small-group attributes -- our race, class, gender, ethnicity, religion -- and that we can arrive at a political arrangement that works well enough for us to live together as part of a larger social group, but for some, an absolute certainty is prevailing over normal politics and that certainty rests on a single idea, that of "identity politics," in which groups of a particular racial, religious, ethnic, social, or cultural identity promote their own specific interests without regard for the interests of any larger political group. This is what 467 people say. What is your opinion? Are 'identity politics' good politics?