The meme seems to have been adapted from an antisemitic image popular among extremists and antisemitic conspiracy theorists.
The Israeli office of the Anti-Defamation League tweeted on Sunday that the image "contained clear antisemitic elements. The danger of antisemitic discourse should not be downplayed."
According to Ha’aretz, Mr Barak, who is shown in the post chasing bank notes, responded by suggesting that Yair Netanyahu should see a psychiatrist.
“Is this what the kid hears at home?” he said. “Is it genetics, or a spontaneous mental illness? It doesn’t matter. In any case, we should fund his psychiatrist instead of security guards and a driver.”
Labour leader Avi Gabbay, tweeted: “It’s a particularly sad day for Israel when a caricature that’s endorsed by the head of the KKK emerges from the home of the prime minister of the Jewish state.”
David Duke, former grand wizard of the Ku Klux Klan, tweeted that the meme “was rife with antisemitic themes” and suggested “(((Soros))) is controlling the world”.
The Daily Stormer, the neo-Nazi website, described the post as “awesome” and Yair Netanyahu as “a total bro”.