The kids came up with the joke:
“Do you like fish sticks?” (Pronounced like “fish dicks”)
Then, when the person said yes, they’d call them a gay fish.
The joke becomes a meme, but Kanye West doesn’t get it, despite having it explained to him. He thinks the joke is directed at him personally, and does actual scientific research to find out why people think he is a gay fish. At the end of the episode, he accepts his fate, and decides to live as a gay fish (complete with a catchy autotuned song.)
^^ This is a much more accurate description of the situation. Mexico isn’t explicitly backing Venezuela’s regime, it’s refusing to take sides.