About non-violent resistance: I don't know if that's enough.  Apparently (and I could be wrong), protestors are observing and not getting in the way as they do what they're doing.  But what they're doing is violent -- abducting people based on race, separating adults from children, making those kids bait by forcing them to ask adults in a house to come out so they can be abducted too, and then pepper-spraying those protestors who aren't getting in the way.  What good is blowing whistles and recording them when the people getting kidnapped are being detained, tortured, and then thrown out of the country?

Yes, intervening is illegal.  But so is what they're doing.  And you say non-violence is going to stop this?