Does "extreme" just mean "not liberal"?

What would liberal extremism even look like?

Look at how “extreme” is used in the discourse and you’ll inevitably find it describing one of two things:

1. Any ideology that does not conform to 21st century liberalism. But in this case the adjective is almost always completely redundant; talking about “extremist communism” is in this sense exactly like talking about “illiberal communism.” Using extreme…