I think the fact that there are so many bigots out there being disproportionately vocal and often working to recruit others to their way of thinking with couched language and dogwhistles make it too easy for some people to assume that anyone speaking negatively of an oppressed group is a bigot.
The trick is usually identifying whether the negativity is about "all" of a group, or just some of them, but subtlety can be challenging in a text only format at times, especially if stuff ever gets taken out of context.