You could pit the insurance industry against the oil industry. You could make it so expensive for a dealership to insure a brand-new ICE vehicle that they don't want the liability of having one on their lot. If an insurer had to pay out on one ICE vehicle at the same dealer every damn day, they would tell their dealer to comply with your extortion, or drop that dealer.
You are right, I don't want to sit in a completely unnecessary traffic jam. The roads are for travel. Travel is a human right, second only to the right to life itself. My right to travel extends out to the point where it intersects your right to travel. As fellow travelers, we must share the roads with each other, not deliberately impede each other.
Travel is so fundamental a right that deliberately and unnecessarily impeding traffic violates about half of the articles in the UN Declaration of Human Rights. The right to travel is sacrosanct. Your right to protest does not grant you any power to detain me or impede my travel.
If you are going to insist on violating rights and privileges in an attempt to persuade the public to your cause, pick some less important ones. From a human rights perspective, violating the right to property by torching an empty car is far less injurious than violating the right to travel by impeding traffic.