When terroristic and supremicist religious views are called simply ‘extremist’ it’s only a matter of time until orthodox Christian theology (viewed as ‘extreme’ by the supporters of SSM and similar causes) is caught up in anti-terror legislation.
As usual, the choice of words smuggles in an agenda. There’s nothing wrong in itself with being extreme. You can be extremely generous or extremely kind. By moving the goalposts from religious violence to a vague ‘extremism’ defined only by liberals (whose imposed consensus is not, of course, considered ‘extreme’), the goal is widened to include convictions that would have been mainstream a few decades ago. ‘Extremism’ is code for open season on orthodox Christianity, using jihadism as the excuse.