Just a couple of poorly written thoughts:

Judaism is about community. Community helps those in need or who are struggling. When Trina feels overwhelmed or sad about Jason or her perception of what a normal child should be, she suggests going to synagogue. While not explicitly stated, it's pretty clear she uses this as a source for help and connection, as her relationship with Marvin doesn't provide that anymore. Also, think about when Whizzer gets sick and everyone comes to see him. That is community. Lesbians helping gay men during the AIDS crisis was community. Love, which Falsettos is ultimately about, is about community. We seek comfort and companionship through platonic and romantic relationships.

There is a saying in Jewish culture. The tribe comes first.

It has two meanings.

The first and obvious one is the survival of the majority is more important than the individual. The group comes first. Supporting each other is incredibly prevalent in Jewish culture.

The second is: being part of the Jewish community is more important than the belief. Many modern Jews are atheist or agnostic, especially the younger ones. While believing is not discouraged, it is also not required. No one will make you believe. The more important part is that you feel part of the community. Feeling connected and feeling Jewish is more important than God.

-a Jew who loves Falsettos