Not so. The plains Indians, for example, roamed around to different areas depending on the season and the availability of game, etc. They kept other tribes out not because they believed they owned anything but because they didn't want to share the available resources. I also didn't say a peep about collective ownership vs individual ownership. If you live in a condo, you might not own the whole building but you own your own residence. Ownership by deed, contract, etc. is a European concept which with the Indians had no familiarity whatever. When they made later agreements with the government those were actions taken by the government in order to try to keep the peace, not because either they or the Indians believed the Indians owned anything.
Lastly, the Indians were on the land they were on simply by virtue of having arrived their first. That might give them a claim but the acknowledgement of such claims came from the government. The idea of actually owning it was not a concept the Indians operated under. Only after they had to deal with the government did this occur. Lastly, you seem to think that I am somehow excusing or glossing over the treatment most N. American tribes received at the hands of the government. I am not and have not done so.
Our land is more valuable than your money. It will last forever. It will not even perish by the flames of fire. As long as the sun shines and the waters flow, this land will be here to give life to men and animals. We cannot sell the lives of men and animals; therefore we cannot sell this land. It was put here for us by the Great Spirit and we cannot sell it because it does not belong to us. You can count your money and burn it within the nod of a buffalo's head, but only the great Spirit can count the grains of sand and the blades of grass of these plains. As a present to you, we will give you anything we have that you can take with you, but the land, never.
--Crowfoot, chief of the Blackfeet, circa 1885