To answer this you have to make a distinction between those on the liberal left, those on the economic left and those who purport to be something they're not.

I am on the economic left because I believe in the redistribution of wealth via taxation with checks and balances. I'm centre-left and I'd be unhappy with a full outbreak of communism because it so easily falls into totalitarianism.

I'm also liberal left, this means I don't mind sharing the world with people who think differently to me, as long as we all get to vote and as long as nobody tries to seize the reigns of power. I'm a classic liberal.

What's happened most recently is that the middle class has 'ideologically' shifted to the left - but they haven't moved there on economic grounds. They have trust funds and start ups and broadly live in metropolitan economic privilege. They view members of the working class as bigots and racists because those people tend to be more conservative on social issues like immigration and trans-rights.

Those new lefties also haven't really embraced liberalism, as this article outlines they don't want to be challenged. They don't want to share the space or have debate, they want to silence any criticism they receive. This has more in common with a totalitarian regime than with liberalism.

So, essentially what you have is a bunch of economically privileged people preaching an ideology they want to enforce across the board without debate, and calling themselves 'left' when they are no such thing. They're simply a different flavour of right wing with rainbow badges and buzzwords.

Economic left liberals are now in the 'centre ground'.