McClatchy Newspapers: The causes of the disastrous blowout and gas explosion on BP’s leased Deepwater Horizon offshore drilling rig in the Gulf of Mexico are a long way from being determined. Yet already BP’s actions are facing unprecedented scrutiny, thanks to a years-long history of legal and ethical violations that critics, judges and members of Congress say shows that the London -based company has a penchant for putting profits ahead of just about everything else. Over the past two decades, BP …