The only issue is what is considered a political issue? Are we filtering based on US politics? Based on the politics of other countries?
I could post a meme about the wealthgap or the cost of living right now, and I would probably get a lot of concurrence because despite it being a political issue, it is something most people can relate to and agree with.
On the otherhand, I could make an LGBTQ related meme, and I would get some backlash because it is controversial to some people.
I could probably agree with OP's meme being political because it is literally an Anarchocommunist poking fun at liberals or American Democrats. On the otherhand, there are several memes here posted daily that are going to "political" to some, and completely benign to others. And in the end, when a sub bans "political" content, it usually comes down to what are the political leanings of the moderation or admin staff.