Should Walmart be unionized why or why not?

Yes, and no. There are currently no unionized Walmart associates (workers) in the United States. At one time a few meat-cutters were unionized, but that fell apart. Now walmart has only pre-packaged meat. In Canada however there are unionized workers. Most people are familiar with the store that shut down after forming a union, but another has popped up, and others are pending certification. http://www.walmartworkerscanada.com