This study analyzes how parental opinions on the Ministry of Education's policy change regarding the College Scholastic Ability Test (CSAT) - specifically, the exclusion of “killer questions” - are formed through internet comments. Online content related to CSAT policies is easily accessible to the public, and opinions on such matters are freely expressed through comments. Therefore, comments on relevant news articles and posts can be considered an important source of parental opinions. In this study, comments from a Naver education-related forum were collected and used to train a transformer-based model, which classified parents' emotions into “anxiety” and ‘relief.“ The analysis of reactions to the killer question exclusion policy revealed that 37.5% of all comments expressed ”anxiety,“ and when excluding comments unrelated to the CSAT policy, the proportion of anxious comments increased to 97.5%. These results suggest that, contrary to the policy's aim of reassuring parents, frequent policy changes have instead heightened their anxiety. This study highlights the need for government policies, including educational reforms, to be formulated and adjusted in a manner that is predictable and based on public trust.