Start? It’s already started.
When will it go hot beyond lefties burning their cities down is the question. Pretty much everything has a building period where things start to accelerate quicker and quicker after the “slow boil” period is over. We are in that period. The American Revolution and the Civil War had that period. Rhodesia had it. South Africa is in it.
We have some disturbing things going on right now. Openly fraudulent election, Big Tech not just complying with government censorship but rushing to voluntarily make it happen, the rule of law collapsing (everywhere, not just the whacko cities/states), absolutely crushing people for a spicy walkthrough of the Capital but doing nothing to rioters who literally murder, assault, and commit arson, Antifa/BLM functioning as a terrorism wing of the Democrat party,