She has been widely described as anti-Muslim. Geller is a prominent activist in what has been described as the counter-jihad movement in the United States. She has been described as part of a broader anti-Muslim network or industry. "Business Insider" has described Geller as a "promoter of anti-Muslim conspiracy theories." Snopes has fact-checked a number of Geller's assertions about Muslims and Islam, and found them to be false. These include: false assertions by Geller that Muslims declared 24 December as Muhammad's birthday, in order to disrupt Christmas celebrations; her promotion of a fake video as evidence of crime by Muslim immigrants in Italy; false claims that Muslim groups kept the money that they raised for the victims of the Tree of Life synagogue shooting; and baseless assertions that Muslims celebrated the Notre Dame fire of 2019. In 2017, she falsely claimed that the Las Vegas shooter was a leftist. In 2018, she falsely claimed that the Parkland shooter “was immersed in Islamic and leftwing hate.”