That would be the difference between "THE LAW" (in this case the common law duty to avoid harming others, whether through negligence, or intent) and "rulemaking".
Even in Florida, I'm pretty sure you have to be responding to a legitimate fear for your life. People blocking the road because there's a march in the street in front of you, cannot be attacked, except in a case of legitimate self-defense - even if the presence of marchers in the street or highway lacks a permit, or is in other ways illegal.
That's my analysis and understanding. Cars have brakes and steering wheels for good reason. If the path you chose is blocked, in almost every circumstance you can find another. If a telephone pole or a tree or rock is blocking the road - you don't try to run it over, do you? If there's no way to reverse course, or go around, you need to summon "the authorities", and have them clear it.