Why is Mama so set against opening a liquor store in A Raisin in the Sun?

Mama is deeply
religious (as demonstrated by her heavy-handed philosophical clashes with ), and she looks down
upon drinking as a vice that makes one focus on the pleasures of the here-and-now, as opposed to
living one's life as ascetically as one can in order to reach the gates of heaven.  Also, Mama
has seen how alcohol has negatively affected the poor people in her neighborhood, one of whom
lives right in her apartment---her son .  She refuses to play any part in his scheme, as it will
mean that she will be a contributor to the destruction of her own people.