JERUSALEM — Israel’s university leaders have lashed out at the nationalist education minister’s plan to impose a code of ethics they say is aimed at limiting their academic freedom.

The umbrella organization of Israel’s university heads says they “vehemently object” to Education Minister Naftali Bennett’s guidelines calling on professors to refrain from expressing political opinions in class or openly supporting an academic boycott of Israel.

Bennett says Sunday he tasked Asa Kasher, an ethics and philosophy professor at Tel Aviv University, to draw up guidelines to protect students from lecturers who impose their “political worldview” on them. Bennett and other hardliners accuse Israel’s academia of having a disproportionate liberal bias.

The university heads said such a code ran counter to the concept of academic freedom and doubted it would be enacted.