Reading a diary entry from a European explorer helps you to understand their interactions with Indigenous people primarily because a primary source, such as a journal, tells the author’s point of view at the time of an event. This means that the explorer's firsthand account captures their thoughts, feelings, observations, and biases, providing insight into how they perceived and interacted with Indigenous communities.
Through their writings, you can gain a deeper understanding of the cultural context, social dynamics, and the impact of their encounters. The explorer's perspective may reveal attitudes towards Indigenous peoples, including respect, curiosity, misunderstanding, or prejudice, which are crucial for analyzing historical interactions and their consequences.