They started enslaving them,brought small pox to Canada which killed many indigenous peoples took their land, ect...
In Alberta, the Blackfoot and several other groups were traditional enemies. They were constantly raiding each other's camps for horses.
It was a sign of bravery for a young brave to sneak into an enemy camp at night, and make off with the horses.
Chiefs were constantly making treaty agreements with their enemies, which usually only lasted until another group of young men went off on another midnight raid.
On the Great Plains in the nineteenth century, the Dakota and Salteaux were traditional enemies, constantly pressuring each other's buffalo hunting grounds.
Eventually, in 1844, they made peace through a treaty negotiated through the Métis.
As the white man pushed west, inter-tribal warfare was to take a back seat in order to confront a much more powerful and ruthless enemy.
The Europeans brought diseases and destruction to many civilizations that had not developed basic immunity responses, ,and the people and their culture suffered as a direct result. The Europeans also seized the land and hunting grounds that sustained indigenous populations to their detriment, but this hardly has anything to do with the discovery of the oldest aboriginal settlement. At least they are now working to unearth and preserve such artifacts and educate the world of these civilizations and their cultures.
The nature of relations between Aborigines and Europeans varied in different districts and was not always violent. European diseases were often the most destructive agent in the decline of Aboriginal groups. Surviving Aborigines began to live in towns as well as country areas. European missionaries sought to break down Aboriginal beliefs and convert Aborigines to Christianity, but they also tried to provide some relief to suffering Aborigines. Yet by the 1830s relationships between Europeans and Aborigines were at a critical stage. European settlers had seized great stretches of country in New South Wales. Some pitched battles and other incidents were of major significance. In northern New South Wales in 1838 a group of station-hands killed twenty-eight bound Aborigines in what became known as the Myall Creek Massacre. In this case, unlike many others, the seven station-hands held to be responsible were convicted and hanged for their crime, despite white sympathy for them. Many whites seemed to share the view of a writer a little earlier "Speaking of them collectively, it must be confessed I entertain very little more respect for the aborigines of New Holland, than for the ourang-outang ... '
Europeans have wiped out many many Aboriginal peoples. They were decitful and disrespectful, and hostile, and continue to be so to this day. The current Dakato Pipeline protests at Standing Rock are a perfect example of the ongoing struggle between native peoples and Europeans. This needs to stop, so they can preserve what is left of their culture.
The Australian government has a liberal policy when it comes to Aboriginals. Their policy is not to interfere or even to interact with the Aboriginals unless the Aboriginals make contact first. With that said, when the Aboriginals choose to be part of European life, it is society's job to prevent abuse and neglect. They haven't interfered too much.