It's no different to the immigration or Brexit discussions, both on MN and nationally.
'If you voted Brexit you must obviously be a hater/bigot/evil' and on the side of Farage/BNP etc
'If you voice any concerns of any kind about unlimited immigration you are obviously a hater/bigot/evil' and on the side of Farage/BNP etc.
Mostly because only those extremist groups are the ones willing to voice any discussion at all. Whateverphobia is coming to mean saying or thinking anything but unquestioning, unlimited approval and support for. None of these are black and white arguments. There can't be the good narrative (unquestioning, unconditional support) and the bad narrative (anti/hater/evil/bigot), there are difficult but valid, reasonable and important discussions to be had on the middle ground.
The backlash of Brexit happened out of the blue in part because too many people had learned they would be socially punished for expressing an off message POV, and became increasingly angry about being silenced over real life things that affected them, encroached on their lives, their wellbeing, and not being allowed to show it or say so. This aspect of liberal politics is not positive, it's not helpful, it doesn't support anyone, and when the inevitable backlash comes from those punished and ostracized and called names for having doubts or a different reality to the on message one, a lot of vulnerable people from those vulnerable groups get more damaged than they would have been had those points of view been something possible to talk about.
Something being offensive, painful or personally upsetting to hear cannot be a basis for making it taboo to talk about. When the subject is shut down as too offensive or too painful, the silenced group have no way to protect themselves from real and serious consequences coming from the extreme end of the subject. That bottled up anger and concern does not go away because it's no-platformed.