Yes, deep - seated feelings of animosity and superiority can affect our speech and actions, causing untold pain to others.
فَقَدْ أَتَتْهُ ٱلنَّصِيحَةُ مِنْ يَهْوَهَ نَفْسِهِ ،‏ وَلٰكِنَّهُ كَانَ مُتَكَبِّرًا جِدًّا بِحَيْثُ إِنَّهُ رَفَضَهَا .‏