solarpunk memes

Assuming you're trying to ask what that term means, it's short for Marxist-Leninist, it's a polite way of referring to tankies, where you accept their rebranding of what is effectively Stalinism. It was after all Stalin's term to coopt and puppeteer the legacy of two dead men to give legitimacy to his reign of terror. They will try to tell you there are principled MLs but if they think there is any merit in the concept then they are doing the same kind of historical revisionism that all tankies do.

And you can see this person was in fact clearly trying to defend Stalin, if only indirectly.

Edit: Also look at the username - they're from lemmy.ml, where the .ml is the Mali country code but in this case it definitely also stands for Marxism-Leninism. It's a tankie instance.