The source of the violence is the same as it was in the late 1800s/early 1900s: the far left: https://medium.com/non-violence/progressive-leftwing-democratic-party-democrats-violent-by-nature-another-assassination-attempt-ca36f46e963e — Your whole article here is an exercise in victim-blaming, trying to evade identifying the actual source of the violence (the left), and shifting the blame onto the victim (Trump).