Strangers can knock on doors and be welcomed into homes. So if you ask to have a glass of water it wouldn't be a problem . Last year, there was a new president and because he started making changes in the economic policy, people got nervous. Tradition is a very strong force in Mexico. It shows up in everything, in the occupation you choose, in ways of conduct in the household, in religion.
People go to church out of tradition.
Just as Protestant religion may be a tradition in this country and it may not mean anything to someone who claims to be a Christian, in Mexico, Catholics would claim that Mary is the spiritual queen of Mexico out of tradition. Pray that Jesus Christ may be proclaimed in Mexico, and that people be freed of tradition to see Christ as He is. For more on missions in Mexico, check out this book in the Library Peril by Choice .