May Day is a traditional day for protests for Communists. Time to give them a taste of their own medicine.
The problem in Oregon is that it's the main day of semi-violent protests every year, by the left. The "black-block" / antifa come out in force looking for a fight.
Anyone dumb enough to give it to them will find themselves arrested and prosecuted to the full extent of the law. In Portland, in the last year, we've seen a 67 year old man prosecuted for driving his car at about 2 mph down a street protesters were blocking, after they surround and rock his car. No acknowledgement by the fascists police or judges that he was in legitimate fear of his life.
Another guy pulled a licensed concealed carry pistol after he was surrounded by the antia creeps. He had the book thrown at him, and again, it was clearly self defense.
Lots of casual counter-protesters have been beaten by the antifa (who are the actual Nazis at this point) and a few have given as good as they get.
Going all the way back to Charlottsville, the Unite the Right protesters were set up by the police, who disarmed them, led them into a confined space, and then before one person spoke declared it a riot and insisted they had to leave via a "guantlet" or armed (with sticks and mace, mostly) again, Lefist scum and antifa. People pushing back from the Unite the Right side were selectively prosecuted, some quite severely.
The fellow who rant into a car that was stopped in the middle of the street when he was trying to get away from the mob that was attacking him (following the GPS route given to return to his home, it was shown in court) and who is a modertately disabled person of was charged and convicted of murder in both State and Federal court and will never see the outside of a prison again. He was 22 I think. (His legal aid lawyer was a joke and aligned with the Left)
So, this is how it goes.
In liberal cities with active Antifa it is IDIOTIC to plan rallies that are likely to be disrupted by them. Having a rally on May Day is major provocation.
Maybe that's what the organizer wants. He seems like a poor strategic thinker, if not an outright shill, like the guy who organized the disaster in Charlottesville. I expect this could go just as poorly, with devastating results for some participants.
At least in Oregon I would advise skipping this rally. There are many better groups that have clearer goals, already planning events, including for the next day: Sat. May 2. Go to those instead.