The answers listed provide potential insights into why it is important to get involved in government such as "because you can become more powerful" or "because it is the only way to get your point across." But these statements miss that involvement in government is an effective way to influence public policy and make changes to your community.
One reason why the British soldiers fired on the Boston colonists during the Boston Massacre was because their were objects being thrown at them. These soldiers were harassed by an angry mob and hit by objects while protecting the Customs Office in Boston.
Another reason why the British soldiers fired on the colonists were because they were afraid of what might happen. Colonists, at this time, rebelled constantly against any symbol of the British government. This included tax collectors, who were tarred and feathered by colonists. These soldiers could have been worried that the colonists might attack them physically.
Two of the most significant totalitarian governments that existed following WWI were in Hitler's Germany and Mussolini's Italy, since both of these governments were "fascist" and were 2/3 of the "Axis" powers during World War II.