No, they're not real. They seem to be made up out of whole cloth (rather than, say, substituting "white man" for "bourgeoisie" in a genuine quote)--I spot-checked a couple and they're not even close to anything genuine.

In general, if you're wondering whether a quote is real you can Google the full text of it, in quotation marks--a real quote will appear in many diverse places, including old books. For instance, my favorite line of Capital, in which Marx calls someone "a genius in the way of bourgeois stupidity" turns up all over. This isn't infallible--some fake quotes have a long history and turn up in respectable sources--but it will catch a lot of the fakes.

Really, the whole idea is pretty ridiculous: Marxism, for better or worse, sees the world in terms of class and economic forces, not in terms of race.

On the other hand, whoever made up these quotes is pretty good at parody--I'm impressed with how they sound authentic.

Hello! White Genocide is a conspiracy theory thought up by White Nationalists.

Here are some helpful tips from illustrious figures from the (relatively) recent past:

"The only people using the term 'white genocide' are people who believe in the conspiracy." - Bill Clinton

"I know of no Marxist author that seriously discusses 'white genocide', much less any that calls for it." - Flava Flav.

"A good rule of thumb is to not waste your time fact checking memes online that are so dishonest in their intent that they don't help you out by citing the source of the quote." - Justin Bieber.