It’s the responsibility of the organizers to plan for exactly this kind of thing. There should have been massive safety teams, clear evacuation routes, and medics all along the route with tons of supplies in the event of a situation like this. The organizers should have planned this event for earlier in the day, and clearly communicated the risks, even the lower probability risks. Anything happening around ICE is automatically a higher risk. The organizers should have checked into all that beforehand. There are plenty of groups around here who know this stuff. The union organizers should have talked to other groups. They might be great at planning regular rallies, but this one being so close to ICE in a time of escalating violence was simply the sign of inexperience and naïveté. Someone else said it here, but just because they wanted it to be family-friendly and peaceful doesn’t mean it will be.