There is a time and place where it becomes appropriate to resist arrest with deadly force, particularly when potentially deadly force is being recklessly and maliciously exerted against a victim by 1 or more felonious police officers. This here appears to be an example of such a situation.
And about groups, I would call that a big fat YES. Whether you're talking about OCers in Michigan meeting in a city as a corrective action after abuse takes place (warren was a good example) or a group like the Deacons For Defense and Justice which paralleled our efforts in countless ways, there is safety in numbers. Bullies tend to be scared of large groups.
Of course, most cities as of lately seem to have thoroughly educated their officers so it's not so important anymore except for a select few situations, but still, it's important to remember that a group is safer when trouble is suspected, and luckily with the folks here, it's easy to get a group for a specific action, even on short notice.