Is a person held accountable if he feels inner mockery or criticism from someone without disclosing it to anyone?

Unintended internal thoughts are forgivable. To harbor ill thoughts about a Muslim without evidence is forbidden. However, if a Muslim openly commits immorality or there is evidence, then there is no blame. Disparaging, belittling, and mocking Muslims is forbidden, and there is a fear that it stems from arrogance. Reflecting on one's own flaws and misdeeds helps in overcoming this.