Social justice warriors and white supremacists despise each other, and yet they have very similar ideologies and approaches to activism.
SJWs demonize whites (especially white males), downplay the faults of individual non-whites, and overlook the majority of good whites to justify their ideology. White supremacists demonize non-whites (especially those with brown skin), downplay the faults of individual whites, and overlook the majority of good non-whites to justify their ideology.
Both call the other intolerant, are obsessed with race (and/or gender), and view people through a collectivist lens. Rather than treat people of all races, genders, and religions as individuals, they bundle everyone into broad social categories.
The radical collectivism of both groups is arguably one of the root causes of social tension today.