To those who voted no would you be fine with someone going close up as possible with the car and just honking?
Sure, I'd say that's a reasonable way to register discontent with the protest without escalating violence.
At the end of the day, the dispute is for legal authorities to settle (though that would require the police to be an impartial arbiter of the law, rather than a state-sanctioned street gang that's overtly sympathetic to far-right causes, so police intervention is to be considered illegitimate until radical police reform is implemented).