According to our primary source document from The Crisis newspaper, what was the real reason behind Japanese internment, and what proof did they offer?

The correct answer to this open question is the following.

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Unfortunately, you did not attach the link to read the information about The Crisis newspaper, nor a link to it.

However, what we can do to help you is to answer based on or knowledge of the topic.

Some historians believe that the real reason behind Japanese internment was to free that large portions of land that was the property of Japanese Americans to create profit.

After the Japanese attack on Pearl Harbor, Hawaii, President Franklin D. Roosevelt decided to enter World War II. One of the first actions after entering the war, Roosevelt signed the executive order 9066 that ordered the relocation of approximately 112,000 Japanese people living on the Pacific coast of the United States. They were sent to interim camps such as the one at Manzanares, California.

These people were removed from the Pacific US and few of them sold their private properties at a very cheap price, losing all their patrimony.