Earlier quoted context omitted.
Everyone finds for themselves what witness they must bear. If the OP feels an obligation to help transform social views of homosexuality, well that's their duty as they see it. Likewise those evangelicals who feel the need to bear witness to what Jesus has done for them. If they share a cab it could well be an exhausting ride for everybody but this is beside the point of their obligations as they seem them. We must a…
We must all do the right as we see it. [..] Doing what _you_ think wrong is wrong. Hmm.. this seems like a form of relativism. Are you implying the inverse as well: Doing what _you_ think right is right? How do you defend that if "right" for me happens to be walking around nude in public, or more extreme, shooting people that I disagree with?
If A wants B, then they should do C If A does C and B doesn't happen, then it's not A's fault If A does C and B doesn't happen, then any person Z (in the set of people we care about) who wants to appear reasonable should not blame A in a conversation about what happened.
So really, "should" is defined in terms of expecting anyone who wants to be reasonable not to blame you.
Many people think "should" is some absolute thing, such as "A should do C" regardless of what they want. It seems to me that absolute morality requires tons of adhoc exceptions and rules, and that relative morality gives a much more fitting description of what happens.