Final answer:
The idea about colonialism expressed in the excerpt is that the actions of the colonists are foolish and ineffective.
Step-by-step explanation:
The idea about colonialism that is most clearly expressed in this excerpt is option C: The actions of the colonists are foolish and ineffective. The passage describes the colonists trying to harm human beings using small weapons, but their attempts turn out to be feeble and ineffective. The quote also mentions that there is a touch of insanity in their actions, suggesting that their efforts are misguided and illogical.
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