These are particularly stupid people. But, why are protesters being arrested?
You'll have to find a journalist to find that out.
Good luck.
If the Keystone project is stopped, Trans Canada will simply build another pipeline over the mountains to the Canadian west coast. From there tankers will take the oil to another customer, China. Production won't cease. In fact there will be more carbon emissions from the tankers and the Chinese refineries. Not only that, but the enviros will have succeeded in feeding an enemy of the USA.
So, how stupid are they, really? The stupidity quotient is truly off the scale.