Identity politics seems intuitive but has very different meanings depending on the person using it. People exploit intuitive notions of "identity" or the ambiguity of "identity politics" in order to manipulate people. I advise caution both when you see people criticizing "identity politics" AND when you see people defending it.
Some people say identity politics cost Democrats the election. Some people have a lot to say of the essentialness of identity politics to leftist politics but are much happier if Democrats would stop talking about economic issues. I think people should be highly suspicious of both types. In this post, I discuss the connections between social justice and economic justice and why if you care about one, you should care about both.