TL;DR: /pol wanted to show that people on r/politics are sheeple who upvote anything that they agree on without checking or reading it, so they make a post that Donald is a racist doo doo head with a link that leads to nothing.
But that's not enough, they also brigade and start to comment under the post and upvote it, trying their best to talk like the liberal strawmen they know. They do this for a few hours and praise themselves in a huge circlejerk on r/the_donald and /pol.
But what they don't know is that the mods deleted the post long ago for having a broken link, and every single supposed libtard redditor who fell for it is actually a pollack in disguise, talking to eachother and upvoting the post without realizing that nobody listens to them or sees the post.
So TL;DR to that TL;DR: They played themselves and congratulated themselves for it
And these guys supposedly won the Meme War I & II!