French authorities have expanded a criminal investigation to include Holocaust denial and historical revisionism connected to Elon Musk's AI chatbot Grok on social media platform X.The investigation intensified after Grok made claims that the gas chambers at Auschwitz-Birkenau were designed for disinfection with Zyklon B and not for mass executions, which was deleted after three days but had over a million views.Separate from this, French authorities also opened a probe following a controversial mass honoring Philippe Pétain, whose denial or minimization of genocide is illegal under the Loi Gayssot of 1990, highlighting France's strict legal stance against Holocaust denial.