It seems primarily to be a chicken and egg problem: The IDW insists that identity politics requires people to identify themselves as a group rather than free-thinking individuals. I think the point this misses is that these groups did not start by self-identifying as groups, they were identified as these groups. The black community, LGBTQ, women, religious minorities - they were first treated as a single group of lock-step individuals by those looking to oppress them. Is it crazy that to respond, they respond as a group?
This idea that they are beating down the discussion by applying ideals to an entire group of disparate individuals I really think is backwards. It is a response to being grouped by outside forces in the first place, where these groups do have a single shared problem now - that they are not viewed as individuals and treated as a single bloc.