By Lucy Craymer and Lewis Jackson WELLINGTON (Reuters) -Tens of thousands of New Zealanders rallied in front of parliament on Tuesday in one of the country's largest ever protests to oppose a bill, which opponents say seeks to dilute the rights of Maori and threatens to set race relations back decades.

The demonstrators oppose a law that would reshape the country's founding treaty between Indigenous Māori and the British Crown.

Tens of thousands of people have marched on the New Zealand parliament in Wellington to protest against a bill that critics say strikes at the core of the country’s founding principles and dilutes the rights of Māori people.