BOGOTA, Sept 27 (Reuters) - Colombian President Gustavo Petro on Saturday dismissed the U.S. decision to revoke his visa and accused Washington of violating international law over his criticism of Israel's actions in Gaza.The U.S. said on Friday it would revoke Petro's visa after he took to New York's streets on Friday to join a pro-Palestinian demonstration and urged U.S. soldiers to disobey President Donald Trump's orders.Read about innovative ideas and the people working on solutions to global crises with the Reuters Beacon newsletter. Sign up here."I no longer have a visa to travel to the United States. I don't...