Once the gap between two different groups with too different interests is too big, it is difficult to find a bridge which is strong and long enough to cover the gap. The problem is even more relevant, if there are people who try to use the reality of the gap to promote their own interests.
Mankind is never safe from such kind of a situation. Things change fast and without any remorse. A big gap of interests combined with some masters and plenty of slaves have the potential to shake complete societies. And it still works that the slaves follow the masters without trying to use their own brain and without making up their own mind.
People are easy to seduce if the situation fits. And it can happen every there any time. Once the slaves started to follow their masters it becomes difficult for both of them to acknowledge that they might be wrong. No party is able to retreat from the march against the other side because it would mean to show to everyone that particular kind of weakness of accepting one’s own ability to fail. To even stop this kind of idea are critical thoughts no longer means of any interest.
Driven by their fundamental fear that the other side might also have a right to exist they march forward and destroy themselves as well as their opponents.