EXTREME RIGHT is used to describe the far right-wing political, social and religious movements outside of and more radical than mainstream conservatism, i.e.
the white supremacist movement, including neo-Nazis, racist skinheads, and the alt right.
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You use the terminology of Leftists
“the terminology”
This is the definition for the terminology I use which is pretty standardized politically for both left & right,
“EXTREME RIGHT” defined as describing the far right-wing political, social and religious agenda of movements outside and more radical than mainstream conservatism, i.e. the white supremacist movement, including neo-Nazis, racist skinheads, and the alt right.