The protests were linked to concerns over personal freedoms and government overreach. Mainly related to COVID-19 mandates and stay at home recommendations.
Supporters saw the movement as a grassroots stand for liberty against government overreach.
*edit the freedom convoy organised 3 years ago in 2022 as pointed out by commenter’s.
Or it was the US. Truckers couldn’t enter the US without vaccination, which is not the Canadian government’s fault.