Nope, you should call people from India as Indians, you call those who were in the Americas before Columbus as pre-Columbine Americans. They AREN'T indians.
Yes, you're right, I should call people from India Indians...but I was just joking.
But, at the same time, I don't think it's wrong to call "native Americans" Indians either, as that is the name Columbus gave them, and it stuck for a few hundred years.