The national defense act was passed in response to what event

The National Defense Act of 1916 was a law passed in order to regulate the organization of the military, particularly the National Guard. This act was passed in response to the raid on Columbus, New Mexico perpetrated by Pancho Villa. The act was passed to ensure that the army would be ready for the next conflict. It also ensured the availability of wartime weapons and equipment.

following type of cultural development caused people to want and buy new products on the market :

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.