It is hard to say no to the big bucks drilling will bring in. He came into office on an "environmentally friendly" platform but now has made the decision to threaten the livelihoods of many indigenous folk. Ecuador has always been an iffy regarding international politics.
Hopefully the ecuadorian president is just using this as leverage for more subsidization and will not follow through with it. Still, someone should warn those indigenous peoples not to accept any blankets from the oil companies.