I don't know about other liberal democratic societies, but there are plenty of people in the US who take Mein Kampf's ideas seriously, and there have been since it was published. Hitler credited America's genocide against Native Americans, segregation and eugenics ideals as an inspiration in it.
American culture has never been entirely averse to authoritarianism, so long as it sends the correct signals (white majority, Christian sympathy, anti-government.) There will always be a significant number of Americans taking such ideas seriously, this is simply inevitable in a culture whose second most foundational principle is the right to shoot people with guns.
American culture has never been entirely averse to authoritarianism, so long as it sends the correct signals (white majority, Christian sympathy, anti-government.) There will always be a significant number of Americans taking such ideas seriously, this is simply inevitable in a culture whose second most foundational principle is the right to shoot people with guns.