IMO, it's not an irrational behaviour on their part. It may seem irrational to us, but I believe it's much more likely to be a rational response to events that

IMO, it's not an irrational behaviour on their part. It may seem irrational to us, but I believe it's much more likely to be a rational response to events that have happened in the past. We just don't know what those events were. I think that's where we differ. You see it as a purely irrational behaviour on their part that doesn't need explaining, whereas I see it as a rational response that does actually have one or more trigger events in the past.