Hate speech is a verbal act that shows negative feelings for minority groups. This research examined and categorized hate speech based on its frequency in the discourse of mothers-in-law and daughters-in-law in multicultural families. The results showed- the following responses by foreign daughters-in-law’ to unilateral expressions by Korean mothers-in-law' rebuttal, avoidance, resignation, complaints, rejection and so on. Previous studies have shown that hate expressions are not explained by logical relationships between premises and conclusions, but, rather, by personal prejudice. Generations learning based on national curriculum must identify the premise of negative emotions that occur against hate speech and analyze the validity of the conclusions drawn from the premise. In addition to the issue of communicating with immigrants, there are many conflicts between generations and age groups. Therefore, it is necessary to make an effort to judge and control the indiscriminate and inappropriate use of hate speech in various situations through linguistic logic (the relationship between premise and conclusion). The researcher proposes that educational contents can be organized based on linguistic logic through intercultural communicative competence, -knowledge, skills and attitudes. That is, linguistic logic builds the competence necessary to recognize users’ identities, facilitate communication, coordinate, and manage conflicts.