Anybody with any moral sense at all would never do such a thing. We all know that bad ideas are to be attacked with good ideas, not with physical violence.
If I were one of those "conspiracy theorists" I'd suggest this was a false-flag operation, mounted by the Family Research Council itself in order to gain sympathy for itself, especially in light of the fact that the victim, a security guard, was only non-fatally injured. However, I really don't think this is true. I suspect the attack was carried out by some badly misguided individual who thinks he's on our side but fails to understand how rational people operate.
While we must continue to oppose the hate-mongering ideas promoted by the Family Research Council, we need to press for prosecution of the attacker to the fullest extent of the law.