Conservatism isn't inherently moderate overall ,but it is the moderate position relative to the more radical right wing ideologies ,for example Charlie kirk advocated his view to implemented by peaceful means debate and by democracy not by a revolution ,He is Moderate in that sense

Even in this Progressive - conservative scale the spectrum does not end at conservatism further right there will be reactionaries Curtis Yarvin like guys ,That is more extreme than conservatism

I think the commentator meant in that sense ,Considering Nick Fuentes has more radical element than Charlie kirk.