prejudice is a disease we can never get rid of

according to http://www.thefreedictionary.com/disease disease is defined as : 'condition or tendency, as of society, regarded as abnormal and harmful' while prejudice is 'Detriment or injury caused to a person by the preconceived, unfavorable conviction of another or others'with prejudice being 'detriment caused by preconceived conviction' it certainly classify it as a 'harmful' disease of the society.i believe that prejudice is a disease that can never be gotten rid of and will forever stays with mankind. Throughout the history, Mankind has been plagued by many fightings like the ancient Crusades, World War 2 that affected the world and recent Iraq conflict. Most of these have something in common, that is they were started by people with prejudice against each other.14th century Byzantine emperor Manuel II Paleologus derided Islam, saying 'Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached.', believing that Muslims are violent. World War 2 is partially started as Nazis believed that other races are inferior and wanted to rule over them. Conflicts in Iraq is continuing to this day as Sunnis and Shi'ites believed that they will be oppressed by the other party should they take over the leadership position. These are just some example of conflicts caused by prejudices.Thus as seen from the example, prejudice is a ancient problem that have troubled the world till today and the root of it lies in nearly everyone. Everyone on Earth, past, present and future is unique and have different ideas, being exposed to a variety of ideologies, cultures and experiences. Being different, it is not possible for someone to fully understand someone else, thus we will assume some ideas about each other, it simply not possible to wait to know someone adequately before doing something.These assumptions are the predecessor to prejudices. Through certain experience we had, we associate these with people. Some are positive while others may be negative. Prejudices are negative preconceived impression we had and we may spread such ideas to others around us as shown in Behind the Sunni-Shi'ite Divide article by Time.With bad impression of people, its not difficult to have misunderstanding and this just worsened the impression we had. Sunni may believed that the hanging of Saddam is deliberately scheduled to coincide with their holy day whereas the reason may just be the current government of Iraq wanted to boost morale of their people, this leads to the belief that Shi'ite will oppressed them.Therefore prejudice are deeply rooted in the world as people are lazy to find out more about others and have misunderstanding. Some people may argue that misunderstanding can be solved over time and prejudice can be exterminated. Citing examples like Germany had repented and apologies for the war, revising their view of other races, they claimed that prejudice can be vanquished from the world given time and efforts.However, i beg to differ. Although Germany had repented, the Holocaust is still generating prejudice in other parts of the world. Some people like Mahmoud Ahmadinejad,current president of the Islamic Republic of Iran, is convinced that Holocaust is exaggerated as a plot by some people against Iran. This highlighted the ability of events in the past to cause more prejudices even when it has been resolved.Thus, i do not believe that prejudice can ever be eradicated because as old misunderstanding is resolved, new misunderstanding with arise, without a fundamental change in the way we think, we will continue to have negative preconceived convictions.