As the United States-backed government in Afghanistan fell to the Taliban and US troops raced to leave the country, White supremacist and anti-government extremists have expressed admiration for what the Taliban accomplished, a worrying development for US officials who have been grappling with the threat of domestic violent extremism.

That praise has also been coupled with a wave of anti-refugee sentiment from far-right groups, as the US and others rushed to evacuate tens of thousands of people from Afghanistan by the Biden administration's August 31 deadline.

Several concerning trends have emerged in recent weeks on online platforms commonly used by anti-government, White supremacist and other domestic violent extremist groups, including "framing the activities of the Taliban as a success," and a model for those who believe in the need for a civil war in the US, the head of the Department of Homeland Security's Office of Intelligence and Analysis, John Cohen, said on a call Friday with local and state law enforcement, obtained by CNN.