Herd mentality at it's worst! It's hard enough to stay safe from cages without having to worry about other motorcyclists. I'm not anti Harley, I've had them and they were not for me. People should ride what they love and enjoy their ride.
Everyone on 2 wheels has witnessed this anti social and careless mob behavior, It is generally the minority IMHO, but senseless just the same. Unfortunately, I'll break a few speeding laws to avoid situations like this, I don't like the noise or putting faith in that type of groups riding abilities.
I don't blame you for being angry! that would piss anyone off