More than 300 people marched from downtown Point Richmond to the Chevron refinery today to protest the company they say is processing crude oil imported from Iraq. Vowing to blockade the facility, about 50 people formed human chains at the entrance to the refinery on Richmond Avenue as others held banners, sang and danced.The protesters were marching against the war in Iraq as well as a proposal to upgrade the refinery's processing capability. They accused Chevron of profiteering from the oil obtained by the Iraqi invasion that has cost many thousands of lives and billions of dollars.Kayla Starr, 66, from...