You'll be laughing at the water protectors until you start drinking oil yourself.
Pipes are both safer and cleaner than other transportation methods for oil.
I think these people are doing just fine.
Cleaner is a bigly oversimplification. While it may be true that trains and vehicles spill more often, the amount of spill is limited to whatever the mode of transport was carrying. With pipelines, the spills can go undetected for days or weeks and the amount of the spill can be very large.
For the areas around where a large spill occurs, that spill is hardly safe either.
Also important is what kind of product is being piped through. Tar sands oil and other types of higher carbon petroleum have to be blended and then heated to a hot enough temperature to cancel out the viscosity issues. Hotter products present a much greater statistical risk of pipeline failure.