I'm not sure. It might be better to let them get overconfident, inevitably screw up and kill people. Give them enough rope to hang themselves is what I'm saying.
Of course, the downside of this is that it assumes that the MSM will cover the incident or not. Then again, if enough people are killed and they don't, it'll look really bad and suspicious on their end. On the other hand, we've seen with the BLM and Antifa 'Protests of Peace' how the media can look the other way and nothing happens. That said, I imagine there's gonna be a world of difference between a bunch of people opening fire on a crowd and some people getting killed off during a riot.