Why did Louis Riel prevent William McDougall from entering Assiniboia?

Louis Riel prevented William McDougall from entering Assiniboia in 1869 because the Métis feared that the transfer of Rupert’s Land from the Hudson’s Bay Company to Canada would compromise their culture, religion, and land rights.12

The Métis were particularly alarmed by the Canadian government's failure to consult them regarding the transfer and by attempts to re-survey their traditional river-lot farms into square lots, which threatened their land titles. The appointment of McDougall—a prominent Canadian expansionist—as the territory's first lieutenant governor further fueled these tensions and fears of English Canadian domination. By blocking McDougall, Riel and his followers aimed to halt the implementation of the transfer until they could negotiate acceptable terms for entering the Canadian Confederation, eventually leading to the formation of a provisional government.123