They said "Nuclear weapons simulations, drone AI, smart bombs - all good. But don't you dare abuse a marginalized group!" which is specially saying that people don't care about these matters for the first set of issues (which is an assumption about the person they were replying to, and an incorrect blanket statement about people in general) and also specifically implying that the only reason people cared in this case was because it involves a marginalised group (which is also an assumption that they didn't attempt to back up with evidence).