Here is what he said prior to making the statement I quoted (to give you some context):

Take historical analogies. I believe that historical analogies are always wrong. This a long discussion, but, to me, the most dangerous thing about Chamberlain’s capitulation to Hitler at Munich is not the fact that Munich happened and it led to further Nazi aggression and so on and so forth, but that the example of Munich has been used to support thousands upon thousands of bad policies and inappropriate decisions. LeMay called JFK’s recommendation for a “quarantine” (that is, a blockade) in the Cuban Missile Crisis “worse than Munich”. Would nuclear war have been a better alternative? But nuclear war was averted by Kennedy’s policies. And thirty years later the Soviet Union collapsed without the need for nuclear war. Was LeMay right? I don’t think so. But again, the example of Munich was invoked to justify the invasion of Iraq. Appeasing Saddam, appeasing Hitler. The use of the Munich analogy does not clarify, it obscures.