Their land was taken over, as was their food source, making it hard for them to survive. They did not have the same rights as Americans either until 1924. They were forced to live on reservations.
There is a claim by some Liberals that the ACA Law does not go far enough in securing the Americans, and reducing health care costs. The law, they say, has brought a lot of good things, but if we take into account the fact that 5300 members of Congress have registered 3300 lobbyists for health care, and more spent on preparing the law itself, than for some campaigns for presidential elections. Therefore, not a small part of this law appears to have been written by foreign private insurance industry or pharmaceutical industry.
For example, many health insurers, patients were bankrupt due to the high cost of health care, under the auspices of the ACA.
Canon law differed from governmental law because canon law included the varying beliefs of the Church. Governmental law didn't.
Hope it helps!