I think the best way to dismantle the arguments/worldviews like this is to stick to the simplicity of good nature and to openly challenge them for having no heart, no love, and if they accept those descriptions of themselves, stop talking to them and broadcast their self admitted behavior for fencesitters.

They have to fall back on a hatred of the weak, it is core to their ranking of who is worthy of empathy and who is not. Without it these people have no compass.

This is never truly a majority popular way of being for human beings. Let your conversation be witnessed by a crowd of neutral people and you win.