Many stereotypes are empirical generalizations with a statistical basis and thus on average tend to be true.
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By using the Boston massacre killings as propaganda, the colonial leaders hoped to unify the colonists around the idea of rebelling against Great Britain.
Both the Indian and the African congress were really huge congresses that both enjoyed having huge influences and power over their respective nations. Both congresses were also known to hold the ideologies of peaceful revolutions against the oppressive rulers. They believed that violence was not the answer and that peaceful negotiations can be done. Both also fought to remove the class system or the class division in their respective countries. The two congresses also fought against prejudice with regard to race, gender, and most importantly, social class.