It isn’t that simple. You both have points. Sure, there was racism, but it was also a huge land and property grab, particularly on the West Coast. It was also about religion. Japanese -Americans were very successful in farming, and had very valuable agricultural land. White farmers and businesses wanted it, without having to buy it at a fair price. White landowners also weren’t very hospitable to growing numbers of Westerners and people interested in Japanese Shin Buddhism, and the newly introduced Zen tradition, so they also wanted to destroy the temples, the priests and nuns. Our Government forced the very popular Shin sect of Buddhism to become more Christian, and have churches, and hymns, and organs. These became the Buddhist Churches of America. Once the Japanese-Americans, and remember, these were American Citizens, were released from the Internment (Concentration) Camps, they were forced to leave their homes, businesses, properties, everything they had, and move to other areas of the country, where they would have less influence.
It was hateful. There was racism, suspicion, Christian bigotry, jealousy, and, most of all, pure greed. It started way before WWII, with the 1913 Alien Land Law. Here is a discussion of the California Land grab:
http://www.fear.org/RMillerJ-A.html
And here is something about the followers of Pure Land (Shin) Buddhism in America, the religion of the common people:
N.B. Please show more respect for other posters here at TPM. We all have something, hopefully, to offer.