> Political violence cannot be deterred with strict gun laws.

If a simplistic definition of political violence is targeted killings of political leaders, then this is trivially false. Look at Europe, Australia and other countries with comparable statistics to US and look at the number of events you'd classify as political violence. It is likely zero. The only person I can think of from recent memory is Shinzo Abe.

In the US alone, thanks to no gun control, we have attempts at Presidential candidates, and successful killings of state-level law makers, CEOs, and now, political influencers.