the hatred of Synths feels a little out of place considering the timeline.
In Prometheus it was okay since Human-like Synths were relatively new, although the viral site indicated that most people where fine with the Synthetics in general.
Alien Covenant, we see a lack of Synth prejudice with Walter
Alien, the crew were more surprised that Ash was a robot then genuine hate
Aliens, everyone was fine with Bishop except for Ripley (until they became friends)
Alien 3, no Synth hatred
Alien Resurrection, I think this is the only time were we saw people genuine hated synths for well uprising against mankind (a hallmark of Joss Weadon lore, everything he writes about Robots always includes this)
PS. I hate the toaster analogy when describing a fully sapient robot. A toaster was never given intelligence nor a will to survive. The biological equivalent to the toaster analogy is someone getting upset for killing a weed. You can't compare humans to a weed just like you can't compare a thinking/feeling robot with a simple kitchen appliance.