First of all, I am shocked that this kind of debate is brought up in the 21st century. The only thing I find more despicable than the fact that this question is being asked is your argument. You debate like a ten year old in grade school who's research is founded on crappy John Wayne movies. I cannot help but think that this kind of argument is born out of ignorance and a rejection of facts. To first correct your argument, you probably did not bother to research any culture of any Native American tribe at all. Almost every tribe found between the Atlantic Coast and the Rocky Mountains were nomadic. This is not to say that tribes were constantly moving around. On the contrary, Native American tribes in the northeast would typically spend 10-15 years in any given settlement until the local resources ran out, and then they moved onto another area. Therefore, many tribes believed that land could not be owned, and that it could only be used temporarily. So as you can see its a clash in idealogies; settlers believed in the concept of private land ownership, while on the other hand, Native Americans had never heard of such a thing. I suppose that from this you could argue that very early on the colonists simply did not know any better. However, rather than try to come to an agreement with tribes on how to use the land, the settlers went ahead and as you so eloquently put it, "evicted or killed" the native populations. Of course this argument can only be applied early on, as North America became further settled, and Native American culture much more easy to grasp and learn, the government continued down the path it was already familiar with.
Now, I ask you, as a fellow American, to do one of the following: First, go out and buy a book called Bury My Heart at Wounded Knee. It is long and sometimes dry, but it provides excellent historical and anecdotal texts that help to portray the plight of many Native American tribes. Read it, and then come back to this debate. However if you do not read that book I ask you then, wherever you may be, in the office, at home, at church, to get out of your seat, go outside, and step in front of a large, fast moving vehicle. It is clear that this is not the only subject that you may have misconceptions of, and it is also clear that you do nothing ni order to fix these misconceptions. This country does not need your type of ignorance.