Easiest way to kickstart it is arming at-risk minorities.
California's strict gun laws have their roots in white conservatives' reaction to the Black Panthers marching with rifles while St. Reagan was governor of the state.
The upside of this strategy is that if the gun laws don't change, then at least those minorities will have some means of protecting themselves.
The reality is that they already have all the excuse they need.
Personally, I'm not a fan of the side that's perfectly happy with pursuing genocide having the perception that they have a monopoly of violence.