The US imports about 8% of its total oil consumption from Venezuela as opposed to 11% from Saudi Arabia.  Additionally, many refineries in the Gulf Coast and on the east coast are specifically designed to process Venezuela's oil.  Venezuela going belly up is a big deal to us if for no other reason than this.  I wouldn't worry about the hypocritical aspect of our foriegn policy, all nations are hypocritical when it comes to their interests.