AITA for giving a stranger who just moved from Canada advice?

I live in a border state in the US. Over the last few years, especially around 3 years ago, we had a noticeable increase in people crossing the border. It’s slowed down since last year, but locals are still aware of it and sometimes run into people passing through. Some folks around here even help them out, especially in winter when conditions are dangerous.

Because of that, I’ve had a few encounters over the years with people who were clearly not from here and who, frankly, stood out in uncomfortable ways. Poor hygiene, strong body odor, littering, and mannerisms that don’t really fit in here, like bobbing their head a lot while talking or using speakerphone in public. I’m not saying everyone is like this, just that it’s been my experience a handful of times.

Anyway, I was at a gas station the other day and started chatting with a guy who turned out to be Canadian. We were talking casually, and for whatever reason the topic of fitting in came up. I told him that if he plans on spending time in the US, it might help to be mindful of things like personal hygiene, not littering, and certain public behaviors that people here find rude, like talking on speakerphone in public. I said it in what I thought was a friendly, well-meaning way, like general advice, not an attack.

He got visibly upset and basically shut down the conversation. He said I was being rude and judgmental. I was honestly surprised because I wasn’t trying to insult him personally. I was just trying to give advice that might help him avoid negative reactions from people here. He didn’t seem dirty or anything. It was more general advice based on what I’ve noticed in the past with people who aren’t from around here.
Now I’m wondering if I crossed a line. I thought I was being helpful, but clearly he took it badly.
So AITA?