Well, there's Liberalism--the meta-ideology--and then there's liberalism: a slightly-left-of-center political ideology within Liberalism. In this article.

the author conflated the two. Johnson actually described very well traditional American conservatism--also a political ideology within Liberalism (along with libertarianism and Liberal--non-Marxist--'socialism').

The thing is, this newfangled conservatism of which Trump is the most prolific mouthpiece is not that. It is nothing but anti-liberalism. It is so anti-liberal that it has reached the point of being anti-Liberal.