Global events often affect oil prices so it is false that oil prices are rarely affected by global events because. An good example of this is the Gulf War.
To add, The Gulf War , codenamed Operation Desert Shield for operations leading to the buildup of troops and defense of Saudi Arabia and Operation Desert in its combat phase, was a war executed by the alliance forces from 35 nations presided over by the United States against Iraq in response to Iraq's invasion and annexation of Kuwait.