The problem with truckers is that they are white— or perceived as white. Being white means that The Authorities will come down hard on the protesting truckers by enforcing the law to the letter.
If the truckers had been members of a visible minority group, such as Black Lives Matter or First Nations, then The Authorities would pussyfoot around. They would neither not talk “law and order,” nor take any firm, decisive action. They would allow the protestors to do whatever they wanted for as long as they wanted to do it. The Authorities would even offer assistance to the protestors.