The Ontario divison of Canada’s largest union has voted to support an international campaign that is boycotting Israel over its treatment of Palestinians.

Delegates to the Canadian Union of Public Employees Ontario convention in Ottawa voted overwhelmingly Saturday to support the campaign until it sees Israel recognizing the Palestinians’ right to self-determination. The Ontario group represents more than 200,000 workers.

The global campaign started last July and has been supported by many North American churches, 20 Quebec organizations, and others, Canadian Press said.

CUPE also condemned what they called Israel’s “apartheid wall,” saying it is illegal under international law.

“Boycott, divestment and sanction worked to end apartheid in South Africa,” said Katherine Nastovski, chairwoman of the CUPE Ontario international solidarity committee.

“We believe the same strategy will work to enforce the rights of Palestinian people, including the right of refugees to return to their homes and properties.”