There are few bits of information that anyone who is going to the rally tomorrow should be aware of. Here they are:

• Nazis thrive on conflict - Polarization is the energy that feeds the Nazis cause. Thus, they will try to hook people into a confrontation by saying outrageous things. Their ultimate goal is to goad anti-nazi protesters into a physical alteraction so they can continue their fiction about being victims of oppression. Don't give them that opportunity. Shouting matches just bring both parties down to the same (low) level.
• Nazis record everything. - The Nazis will be videotaping everything (as will be anti-nazi protesters). The Nazis will carefully comb over their recordings for any language that they can manipulate or distort. Thus, watch what you say or shout at them - make sure your message is clear. Some examples: "Olympia is a hate-free zone!" "Not in our town!" etc. Shouting such things as "Death to Nazis!" or other obscenities just contributes to their victim fantasy.
• Nazis don't have good manners - There will be many more anti-nazi protesters than Nazis, so it is unlikely that they will engage in violence, but they will escalate as much as they feel they can get away with. New recruits to the Nazi group may be motivated to "prove" themselves by engaging in physical violence. Thus, don't expect them to respect behavioral norms.

Humor is the best approach. See A master plan to deal with the master race and Creative ways to protest Nazis for more on this approach.