Amazon Boycott au Québec Effects

With the recent warehouses closing and the overall anger and push back against the proposed tariffs, there was a lot of talk about cancelling Amazon and making an effort to shop more locally, especially for Quebecers.

I don't know anything about stocks and the market so is there a way we will be able to see in a few months, maybe a year, if we actually put our money where our mouth is? Let's say they lose $X next quarter, is it specific enough to know if it was because of us?

I hope this makes sense, thanks !!!