The Charter is pretty clear on the limitations placed on protests.
If those truckers had dispersed within a day they would have been fine.
But they were accepting donations and foreign money in order to stay encamped and had no intention of dispersing.
(Because banks will already algorithmically drop you as a customer without explanation or recourse, akin to how you can get your Google account algorithimically banned. TBH it would be more of an inconvenience to have my Google account banned than one of my bank accounts.)
Congratulations, you're in an extremely privileged segment of society. Most of those truckers would likely find it easier to relate to a little green Martian in a flying saucer than to you.
The banks can already choose not to do business with you for any reason or no reason at all. It’s in the pamphlets they give when you open an account.