What about an online petition or a bake sale?
Less sarcastically: there are frequently situations in which a majority may democratically decide to make a minority behave in a certain way. I think it is relatively clear from opinion polls that a majority of Canadians do not agree with the behavior of the truckers. So writing to an MP or running for parliament will probably be a fruitless strategy. Hence the protests.
It would be trivial to find unpleasant, widely-condemned situations in which you and I would probably be united in our opposition.
The difficulty comes when the minority being forced to behave in a certain way are non-appealing in some way. Democracies need to find a way of dealing with them. It will be horse-trading, negotiation, cajoling, appealing and arguing.
None of those strategies were applied by the Trudeau government before they became hysterical and tried to claim they were having a Canadian version of Jan 6th.
I am certain that many Canadians both do not agree with the apparent demands of the truckers and simultaneously do not agree with the application of the Emergencies Act.
I found this podcast interesting: three interviews with people who were doxxed as donors. I disagreed with the first two, but the third one seemed like a very sane person: https://www.canadaland.com/podcast/756-how-i-ended-up-suppor...