"1.6 million Arabs/Muslims live in Israel. Will the Western governments react or keep silent under pressure again?" he asked.
In campaign mode before April 9 elections, Netanyahu said all citizens including Arabs had equal rights but referred to a deeply controversial law passed last year declaring Israel the nation-state of the Jewish people.
"Israel is not a state of all its citizens," Netanyahu wrote in response to comments from an Israeli actress.
"According to the basic nationality law we passed, Israel is the nation-state of the Jewish people -- and only it," he said, in comments that made waves in Israel.
Israel and Turkey in 2016 ended a rift triggered by the Israeli storming of a Gaza-bound ship that left 10 Turkish activists dead and led to a downgrading of diplomatic ties.
Netanyahu has been accused by critics of demonising Israeli Arabs, who make up some 17.5 percent of the population, in a bid to boost right-wing turnout for April polls.
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