Examine that a second. Your fantasy is to have someone left that it's okay to crush because you are clearly the right and they are clearly the wrong. It's a power fantasy in which there must be someone that it is okay to subjugate
The argument PossibleCabbage and many other are making is that the view that there should be people whom it is okay to crush because they are clearly evil and must be destroyed or crushed has been used in the real world to subjugate real people. The first step toward dehumanizing a real population is to paint them as an evil monolith, savage and unmovable.
It hits close to home to some people for whom the effects of that overt othering and its covert aftershocks are still felt in real life.
Why is your power fantasy more important than their response to the real world version of your power fantasy in an online conversation? If everyone at your table wants to play with older tropes like that, no one is stopping you. So why do you have to shut down a more nuanced conversation? Why must we only discuss fantasy games on the terms that suit your interpretations?
Is there not space for nuance in this community?