Some fuzzy thinking individuals caution that we must not make the same mistakes we did during WWII when Americans were united in feeling uneasy about Japanese after Pearl Harbor. They had good reason to feel uneasy about the Japanese back then.
These same fuzzy headed thinkers urge that we should not rush to judgment about Muslims in the same way. However we have even better reason to feel uneasy about Muslims today.
A more accurate analogy would be to compare Nazis to Muslims, not Japanese to Muslims. Japanese refer to the people of Japan, a nationality comprised of people with a variety of beliefs. We embraced people of Japanese origin in our military because being simply Japanese did not necessarily mean that they ascribed to the supremacist, violently aggressive doctrine of their government.
On the other hand, Muslims, by definition, ascribe to a doctrine that has shown itself to be supremacist and violently aggressive and has these principles embedded in its doctrine. Muslim is not a nation – it is a belief system.
At this point in time in our understanding of Muslims, the people, and Islam, the doctrine, we obviously do not have the capacity or inclination to discern the difference between peaceful Muslims and Jihadi Muslims – or when the peaceful will turn Jihadi. Until we have a desire to learn the difference and means to discern the difference, it is foolhardy to have Muslims in our military in the same way it was foolhardy to have avowed Nazis in the military during WWII.