Authoritarianism is by definition illiberal and anyone who is authoritarian or supports authoritarianism is not liberal no matter what they claim to be. Centrism is also a meme, anyone who claims to be a centrist is usually just a stan for authoritarians in disguise.
The core tenant of liberalism is respect for the autonomy and civil liberties of the individual and consent of the governed to the rules of the government through the machinations of democracy. Any system claiming to be liberal without subscribing to that is a farce.
The same could be said of the "far left". They claim to be leftists, and they might have started out as such, but they have stepped out into crazy land and end up supporting things antithetical to the ideologies they claim to subscribe to.