That argument doesn't wash. To avoid pain in Hawaii, you'd rather inflict pain on the United States.
Yes, the argument is valid. The study didn't take into account the intangibles such as higher taxes to take care of displaced families as well as the effects on the workers and society of the "burger-flipping" jobs that the displaced workers may or may not find.
The study is flawed therefore. They looks only at one aspect and leave out the bigger picture. Liberals argue that way all the time.
You guys are desperate and simplistic. Your method of argument is similar to that of the gun-banners. Shame on you.