Why do people deny there were gas chambers in Nazi concentration camps?

People may deny the existence of gas chambers in Nazi concentration camps due to a combination of factors, including ideological beliefs, anti-Semitism, and a desire to minimize or deny the atrocities of the Holocaust. Some may also be influenced by conspiracy theories or misinformation that seeks to challenge the established historical narrative. Additionally, denial can serve as a means to absolve guilt or maintain a particular worldview that resists acknowledging the brutality of the Nazi regime. Such denial often disregards extensive historical evidence and testimonies from survivors.