Why did American Indians in Indian Territory feel that joint statehood would threaten their sovereignty?

As the Oklahoma Territory moved toward statehood in the late nineteenth century, the Territorial Legislature passed laws which began to superimpose some jurisdiction over the Indian nations within the Territory. In 1899, the Territorial Legislature prohibited the practices of Indian medicine men. Those who practiced the incantations and healing ceremonies of the medicine men were subjected to not only fines, but also imprisonment. In addition, Indians were required to be married under American law rather than Indian custom. In a move against the Native American church, the Legislature also made peyote illegal.

Explanation:

someone or something lol