Commentary China and the United States are in a tit-for-tat fight over airline travel between the two countries. China started it, by unfairly imposing restrictions on United Airlines for some of its passengers who tested positive for COVID-19 after they landed. Hitting China back for this predatory air travel policy is the right strategy. But the U.S. counter is tiny in comparison to what needs to be done, starting with trillions of dollars in compensation for losses from COVID-19 and intellectual property theft by China that reaches as much as $600 billion annually against the United States. U.S. cancellation of four Chinese flights, in response to the same from China, only serves to clarify the paucity of America’s defenses against the much bigger harms done by the Chinese Communist Party. United Airlines, which complied with preflight checks and inflight protocols, couldn’t have known in advance that five of its San …