Okay, this is based off of a essay that I wrote, when we were told to write an opinion essay.
The Pure-Bloods in the wizarding world were intimidated by Hermione Granger for several reasons, primarily rooted in their deep-seated beliefs about blood purity and the superiority of magical lineage. Hermione, despite being a Muggle-born witch with no magical ancestry, consistently outperformed many of her Pure-Blood peers in academic prowess, spellwork, and overall magical competence. Her intelligence, hard work, and dedication challenged the notion that only those born into wizarding families could excel in the magical arts. This shattered the elitist ideology that Pure-Bloods had held onto for centuries, making them feel threatened by the idea that talent and ability were not confined to bloodlines but could be found in anyone, regardless of their heritage.