Insincerity by virtue of pretending to have qualities or beliefs that you do not really have WordNet 3.0 & Open English WordNet

Hypocrisy is the practice of feigning to be what one is not or to believe what one does not. Wikipedia

Act of pretending to have beliefs, opinions, virtues, feelings, qualities, or standards that one does not actually have. Wikipedia Disambiguation

Pretense of virtue; failure to follow one’s own expressed moral principles Wikidata

The practice of engaging in the same behaviour or activity for which one criticises another; moral self-contradiction whereby the behavior of one or more people belies their own claimed or implied possession of certain beliefs, standards or virtues. Wiktionary