Thud:
I don't know of anyone who supported the despicable bombing in OK, although it is inevitably true that you are correct in surmising that some did. (And, I believe that if those who did or do were known, they would be reviled.) But to answer your question: Yes, I think that one's support or understanding does "weigh less if you don't dance in the streets," and for a number of reasons.
Here are two: First, when you dance in the street, you rub salt in a raw, open wound. You have, in a very real way, added to the pain of those already suffering. Second, when you dance in the street, you let everyone know exactly where you stand. For those, like me, that would judge by one's actions and character rather than by name, race, or creed, when you dance in the streets in celebration of an unequivocally and obviously heinous act, your actions have spoken, your character has been revealed, and you have chosen sides.
- JNOV