I don't think that sin and pursuing happiness are not necessarily the same thing.

How can you tell somebody whose is pursuing happiness that they're somehow not American when that was the very first promise that America made?

The bullied straight kid goes home to a shoulder to cry on and support and can talk freely about his experience at school and why he's being bullied. I couldn't go home and open up to my parents.

The cultural expectation should be if there's infidelity, the marriage is more important than fidelity.

Straight couples don't have to be monogamous to be married or married to be monogamous. Monogamy no more defines marriage than the presence of children does. Monogamy isn't compulsory and its absence doesn't invalidate a marriage.