They’ll be as respectful as the rowdy protesters were with the runners of the Olympic torch.
The media tries to cover for them with “a few protesters clashed with police” or “except for a small number...”
The organizers of these demonstrations not only know in advance that some of there number are going to vandalize property and attack police, in fact I am sure it is part of the over all plan.
In fact when conservatives actually try to have a non-vilimt protest against abortion or illegal immigration they are frequently met with violence.