If I were a married person and had a child, I would want that child to have the faith that I believe, the faith that I cherish, the faith that I believe has made me a better person, a better citizen of Canada, a better member of my community and which, hopefully, some day would make me a star citizen in the eternity of heaven.
Married people with children should have the same faith in order to become better people. 
The statement simply says that if they were a married person with a child they want the child to share the same faith  because they believe their faith made them better. It did not say it was necessary in order to become better people. 
( z1 recommend :ARG1 ( z2 have :ARG0 ( z3 person :ARG1-of ( z4 marry ) :ARG0-of ( z5 have :ARG1 ( z6 child ) ) ) :ARG1 ( z7 faith :ARG1-of ( z8 same ) ) :purpose ( z9 become :ARG1 z3 :ARG2 ( z10 person :ARG1-of ( z11 have-degree :ARG2 ( z12 good :ARG1 z10 ) :ARG3 ( z13 more ) ) ) ) ) )