That's not what they think. They think that employees in the US would get good wages and the cost of goods wouldn't change. They don't understand the simple economics behind moving a factory to a country with a low manufacturing overhead.
They would be the first to complain that Nike wages are too low and/or Nike trainers now cost too much. Nike would be accused of price gouging even when they would probably struggle a lot more to be profitable.
Is a have your cake and eat it situation. Oh and it's also worth noting that I expect almost all of the people who complain about manufacturing being overseas and not in the USA would not consider the jobs they want to bring home.
"There are plenty of other Americans who would do them, but i am destined for greater things than that"