Nope, no oil, but military contracts. Haliburton was more than oil back then. They got involved with government contracts back in the new deal days and never weaned themselves from it. During Vietnam, they were small players,but the profits were huge.
Kennedy had already started troop withdrawal when he was killed. After going through it with his advisors, he came to the same conclusion Walter Cronkite did a few years later: it was an unwinable war. Troop withdrawals were quickly canceled and LBJ stepped up the action. All to the benefit of his supporters, the Military Industrial Complex that Ike had warned us about. Oh, and if you look at LBJ holdings, you'll discover he profited, too.
Hippies? Real hippies went to Haight Ashbury or communes around the country. They dropped out if the main stream. The ones that fled to Canada were some of our brightest talent that saw through the façade. Some, like Mohammed Ali, stayed and fought the government even though he had a non combat position waiting for him.
Oil became the target in the 70s, after the Arab oil embargo, but in the sixties, it was the war suppliers that made out. 60,000 menband women, many who believed they were fighting communism, died to restart the ogliarchy within our borders.
And Canada, for the most part, got the cream of our young generation.