The story 'Mericans' depicts how Hispanic and Mexican immigration was having an impact on the fabric of American society and how it had created a new population which was unsure of its identity.
In some cases, the majority white population was racist towards the Mexicans while in other cases it was not.
However, even if the language and food of Mexicans was being celebrated by the majority white population, there were still several identity crises within the young.
The story gives the example of two Mexican kids who speak English and want to embrace the ways of America. However, their traditonal grandmother wants them to focus on the church, speaking Spanish and live a more 'Mexican' Life.
Such identity crises were experienced by many immigrants and still has a huge impact on first-generation immigrants from China, Pakistan, India etc
While many might say the fridge needs to be opened first to prepare breakfast, note that it does not say that the parents are in the house, and therefore they would need to be let in. Hence the answer of what to open first would be "the door".