Why are thousands protesting for Māori rights in New Zealand?

Tens of thousands of protesters marched in New Zealand's capital on Tuesday, demanding the protection of Māori treaty rights. The demonstration was sparked by a proposed bill that critics say could undermine the Treaty of Waitangi, the country's founding document. Protesters say the bill, which aims to redefine the treaty's principles, could reverse decades of progress in recognizing Māori rights.