“I guess I’m watching too much ‘Game of Thrones,’” he said.

Mr. Nafar, 39, began his hip-hop career in the late 1990s, and his lyrics took a strong political turn with the outbreak of the Palestinian uprising known as the Second Intifada, in 2000. The son of Palestinian refugees and a father of two, he was the star of a celebrated autobiographical film, “Junction 48,” in 2016. The Israeli culture minister, Miri Regev, walked out on his performance at the country’s movie awards ceremony that year and has tried to have his performances canceled.

“I’m not saying that being in the Knesset is the best medicine, but if I want to let go of it I should do that dose by dose,” he said, explaining his decision to vote — not all at once, with nothing in its place.

In the video, Mr. Nafar’s pro-boycott persona has little use for Arab politicians. “Did they deal with poverty? Did they bring us schools and jobs?” he asks. “We only see them out there during elections.” He adds that he voted for the Joint List the last time, but infighting broke it apart. “For me, this ship has sunk,” he says.

Yet Mr. Nafar’s pro-vote voice says that rather than the Titanic, he sees Arab politicians as the Mavi Marmara — the protest ship that tried to defy the Israeli blockade of Gaza in 2010, gaining international attention for the Palestinian cause. “It doesn’t make sense for me to give up a tool, when I hardly have any tools, so I’m going to vote,” he says.

The alternative, Mr. Nafar said in the interview, would be to allow Israeli leaders to do whatever they wanted to Palestinian citizens — even if, as some extremist right-wing politicians would like, that meant transferring Arab citizens out of Israel.

Voting, Mr. Nafar’s alter ego says in the video, was at least one thing he has the power to do to ensure “that I can sing to the boycotters, rather than talk to them in the transfer trucks.”