Legality aside, I think I would pretty much always consider my life/well-being in danger at the point that people start pounding on or shaking my vehicle. Possibly, depending on circumstances, much sooner and before they laid hands on the vehicle.
At the point of physical contact though, for sure. At that point my safety becomes too unpredictable. Otherwise, I agree that it pretty much always falls into "kidnapping" if they block my vehicle and won't let me through. In a fair world, you should always be able to proceed through such barricades before the cops arrive, and if the cops arrive and don't clear things out, you should still be able to proceed. I don't care what your cause is, even if I'm sympathetic to it. You have no right to stop my free movement on a public roadway whether you're BLM or the NRA.
