I also dont believe in violence, but Trump and Trump supporters also dont believe in democracy considering they attempted an insurrection using fake votes to overturn the democratic vote.
I will link this again as still few seem to be aware that Trump was trying to fake election results and pressure Pence to certify his fake electors from states he lost. A coup attempt.
https://en.wikipedia.org/wiki/Trump_fake_electors_plot
Also here is another link to remind them how they have always been the main instigators of violent rhetoric. Ironic considering Trump literally stacked the courts, maybe the shooter was taking his suggestion here.