This can best be seen by how labour is treated in the modern "left".

Labour has been the backbone of leftism before leftism was even a thing. Think about every major revolution that overthrew an authoritarian and brutal government and you'll find the working class acting as the shock troops and the stalwart base of it (even if the leadership is the educated middle class). Leftist causes have succeeded in the past because the working class literally put their bodies on the line for things.

But now, in this era of the "identity left", the working class are too flawed to be treated well. They're treated, indeed, like they're the disease as the simpering intellectuals (pseudo- or otherwise) of the middle class sit in their comfortable lives and contrive complaint after complaint about every little "micro cause" (I like that term and will be stealing it) that catches their fancy while shunning the only people in history who've shown they're willing to put their bodies into causes.

Surprise! They've become ineffectual! And the working class, having been abandoned by the faux-left, and indeed being despised by them, turn to the other side in the (sadly vain) hope that SOMEONE will give a shit about them.