Trudeau really only approved one pipeline;  Kinder Morgan. The Enbridge Line 3 is a partial rebuild of an old, existing system. I am sure, as anyone with a shred of common sense would admit,  replacing an old pipeline lowers environmental risk and enhances safety. If Kinder Morgan is not built then the oil will be delivered by rail and that is a riskier alternative.  We are all "stewards of the Earth" Mr. Philip. First nations do not have a monopoly on that role. We all burn fossil fuels, we all create waste, we all have a carbon footprint. 
The goal should be to remove hypocrisy from the anti-pipeline debate and focus instead on what is good for the whole country and for the well being of every citizen and that includes the 97% of us who are not indigenous. If  we are truly going to be "stewards of the Earth" then let us start using less carbon, then we won't need any pipelines.