"Just asking questions" is the biggest red flag of ill intent, its not doubt I would ban someone for resorting to that. Especially if we look at the facts given in the comment.
" saying at the time we didn't yet know how many doses and on what schedule of the vaccine would be needed."
"I messaged the mods to explain that I was triple-vaxxed "
So we can infer from this post that this happened sometime after Aug 2021. So someone went into the Canada Coronavirus group, a group where posts seem to get tens of comments, and brought up completely innocently, "how we don't know how many doses" we need. To make a broader point on what... could it have been, "how we shouldn't have a mandate?"
Perhaps this was closer to Feb/2022 where the Trucker protest was raging across Canada. Of course, the mods may not want a big flamewar over mandates in their group that seems like a niche information aggregation sub.