Why does the white man get all the blame, when it comes to taking the land from the Indians.?

Wasn't the Spanish/Portuguese the first to arrive in America? Of course the Spanish and Portuguese were one, due to the King of Spain and Queen of Portugal marrying. I do know that they took Mexico, after trying to negotiate with the Aztecs. When Negotiations failed, the Spanish empire crushed the Aztecs. It was here, that the Spanish moved upward into the U.S.