How can Martin feel both ashamed and proud of grandpa in medicine bag?

In "The Medicine Bag," Martin feels ashamed of his grandfather because he perceives him as an embarrassment due to his traditional appearance and the unfamiliar customs associated with their Native American heritage. However, he also feels proud of his grandfather as he recognizes the wisdom, strength, and cultural significance that his grandfather represents. This duality reflects Martin's internal struggle between embracing his identity and the societal pressures that dictate how he should feel about his heritage. Ultimately, Martin's journey leads him to appreciate the importance of family and cultural connection.