The only mention of incels in the PDF:
"Another key component of the threat comes from anti–government or anti–authority violent extremists. This significant component of today’s threat includes self–proclaimed “militias” and militia violent extremists who take steps to violently resist government authority or facilitate the overthrow of the U.S. Government based on perceived overreach; anarchist violent extremists, who violently oppose all forms of capitalism, corporate globalization, and governing institutions, which they perceive as harmful to society; sovereign citizen violent extremists, who believe they are immune from government authority and laws; or any other National Strategy for Countering Domestic Terrorism 9 individual or group who engages in violence – or incites imminent violence – in opposition to legislative, regulatory, or other actions taken by the government. Other domestic terrorists may be motivated to violence by single–issue ideologies related to abortion–, animal rights–, environmental–, or involuntary celibate–violent extremism, as well as other grievances – or a combination of ideological influences. In some cases, individuals may develop their own idiosyncratic justifications for violence that defy ready categorization."