When confronted with contentious moral issues such as female genital mutilation, honor killings, and so on many students in my ethics class say things like:
"Who are we to judge whether this is right or wrong."
"It seems wrong to us, but that's how they were raised."
"That's their belief."
"Who are we to say they're wrong?"
It doesn't take much courage to make statements like this. They seem profound on the surface but really don't advance the conversation at all.
I think many people often underestimate the power of standing up and stating their views (especially when they have reason and evidence to back them up). Just look at someone like Martin Luther King. Imagine him going to the march on Washington and saying "Well, there's not much we can do about racism and segregation. After all, that's all they know. That's how they were raised. Who are we to say they are wrong?" Imagine how different (and worse off) our society would be today as a result of a speech like that!
No, Martin Luther King stood up and defended what was right. And it made a difference.
That's what moral courage looks like. Be willing to look at the evidence. Stand up. Speak out.