In this context, the meme is talking about liberals not in the American conservative vs liberal sense, but in the liberalism sense. Whereas leftists, who most Americans would think of as “extremely liberal”, are not actually liberals at all, since we oppose free market capitalism and private property.

I am here to chew bubble gum and post memes in the memes community, and I’m all out of bubble gum

Despite the meme, I totally agree! Most liberals I encounter are well-intentioned, but have been indoctrinated into thinking that capitalism is the best system we have available. Being patient and answering questions that explain what you actually believe, not what they’ve been told you believe, goes a long way. That said, being patient like that definitely a skill that is not always easy to get right, and certainly takes practice.

I’d love to retire to a cozy inn with an endless pot of stew

Exactly. If it wasn’t clear in 2016, it certainly is now - Trump is a symptom, not the root problem