Genocide usually comes with this kind of conflicts, when the involved groups grow to hate each other so much that they decide to establish an unofficial war to terminate the other groups as a way to eliminate the cause of their annoyance. This phenomenon can manifest itself in many ways, from social discrimination and exclusion, accompanied by stereotypes, prejudice and discrimination, going as far as political actions, violent confrontations, genocide, terrorism and war. The use of violence or threat to recur to it with political intentions aimed towards minorities or communities is usually carried out by nongovernmental groups or secret organizations that operate outside the regular parameters of official war or political negotiation. They often seek revolution or civil war. More than military goals, terrorism seeks to cause panic within the community to force them into acting according to the terrorist will. Terrorism often tries to destabilize a state creating chaos to make a radical transformation in its existing order. Terrorism has existed even from ancient times, when the Jews rebelled against the roman domination with illicit violent acts, at the beginning of the Christian era. Another example are the Muslims assassinations during the crusades. Governments have also recurred to violence to ensure the control over their people and repression of dissidents. The assassination of important personalities was one of the most commonly employed weapons of this form of war. After WWI the XX century experienced the diffusion of terrorism in a larger scale. Regimes like the Nazi or soviet government used violence and panic to impose an ideology on their own people.

We referred to charismatic leaders in the beginning of the paper....

We chose that particular subject because it is the root of practically all of the other sociological phenomena discussed. It is usually the leaders that establish whether a society will remain traditional or open up to change. It is usually the leaders that dictate how a community will relate to other groups. Ethnic conflicts, war and terrorism are usually caused because of the influence of charismatic leaders that can induce people into sharing their beliefs and performing their wishes. Two great examples of this kind of leaders would be Joseph Stalin and Winston Churchill. They were both great leaders and could persuade people to believe in them, love and follow their ideas, although they were both in very different circumstances and societies and political environments. The charm such leaders had over masses stated important changes in their time and society, they could change the mentality of people, state new points-of-view and influence the visions of future generations, even after their own death.
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Weinbera, L.B., Pedahzur, a. (2003) Political parties and terrorist groups. New York: Routledge