No you didn't. You just asserted it to be so without ever once bothering to demonstrate it. I responded by noting that Marx used the terms "proletariat" and "working class" interchangably - a fact that you admittedly did not know since you have never read anything by Marx. For any reasonable person, that would have been enough to settle their confusion. But you are not reasonable, hence you continue spouting that same old line despite its lack of any merit whatsoever. Oh well, quod gratis asseritur, gratis negatur.
The truth isn't good enough for you neo-Confederates so you have to change reality to suit your agenda and you falsified Marx' quote.