The concept of being "genuine" is complex and can be interpreted in different ways. In general, authenticity and genuineness involve being true to oneself, expressing honest feelings, thoughts, and intentions, and not pretending to be someone you are not.
If a person is always nice to everyone on the surface but feels disgust or dislike towards them on the inside, there is a disconnect between their outward behavior and their inner emotions. Some might argue that this behavior is not entirely genuine because it involves suppressing true feelings and putting on a facade.
However, human emotions and interactions are multifaceted. People often navigate social situations with a level of diplomacy and politeness, even if they don't feel particularly positive emotions towards others. It's common for individuals to have complex emotional responses, and this can sometimes lead to incongruity between how they feel inside and how they behave outwardly.
Whether this behavior is considered genuine can depend on the context and the extent of the disconnect between the person's inner feelings and their outward behavior. Some might argue that it's essential to be honest with oneself and others, while others may believe that being polite and maintaining harmony in social situations is equally important.
Ultimately, the question of genuineness and authenticity is a subjective matter. It's important for individuals to be self-aware and introspective, recognizing their true feelings and motivations, and deciding how they wish to express themselves in different situations. Striving for genuine interactions can lead to more meaningful and authentic relationships with others. However, navigating social dynamics and expressing emotions can be a complex process, and people may find different ways to balance their inner feelings with their outward behavior.