Good points all around. Bullying occurs in all groups of people -- even among nuns and priests. People prey on weakness. Everyone has their share of weaknesses; if they are social in nature, the interactions become stressful for the people involved. When stressed, a common response is to become negative. It is hard to resist lashing out when you become uncomfortable and stressed. Some lash out by becoming passive aggressive rather than full-on aggressive, which is less socially acceptable.
Misunderstandings can prompt stress, and lead to negative assumptions, thus produce a stress response of some kind. My stress response often includes avoiding anything that has caused unresolved conflicts in the past. Most interactions with people are neutral or negative. Since there are only rare positive interactions in my past, I avoid direct interacting when possible. My energy and time is wasted on social activities. Practice has not helped much.
I have many sensitivities, which qualify as weaknesses, and they become apparent pretty quickly if I am not prepared. Talking without a script leads to awkward encounters, which makes the person/people I'm talking to uncomfortable. I give great presentations, because I have prepared. That assessment isn't my own; it comes from professors and peers. Utilizing my long-term memory pathway makes for a more relaxed demeanor. The short-term memory pathway creates too much stress in me, which leads to stress in others. Stress is contagious.
In summary, all groups are sensitive to stressful interactions. If spontaneous conversation on topics you don't often talk about make you feel stressed, then it might be helpful to create a few scripts that could work in multiple situations. That way, you utilize your long-term memory pathway. This may lessen your stress, which can prevent the 'stress transfer', and in turn, prevent a negative response.