"All of the Above" is the obvious and only answer for the poll, at least to me. The four people in Union Robotics right now have such a lot of high-stacked neuroses and inadequate social instincts that someone offending someone else is almost inevitable and all of them accidentally saying something offensive/stupid at least once is just as much so.
In some ways, I'm smiling and nodding at Bubbles' reaction here. She isn't happy with Evie's approach to her and is showing it in panel 4 but Evie clearly isn't getting the non-verbal message! Once, this would have sent Bubbles into a rage but, after being steadily inoculated to this mindset by long association with Emily and, to a lesser extent, Faye, she's only feeling annoyance and maybe a little amazed by this conversation... Well, lecture actually.
The big take-away? Whilst distrust and suspicion are instinctive reactions to something different, it takes time and effort to put energy into something as complex and sustained as hate.