After the way we treated first nations?  You mean taking a stone-age society and introducing improvements such as the wheel?  Healthcare, nutrition and a secure food supply that has raised the average lifespan of a native person by more than double the 36 years that existed before our arrival?  Electricity?  Metallurgy?  

I don't feel we have any reason to be ashamed at raising the standard of living of the original inhabitants of what is now Canada.