I remember reading that years ago and I almost did something similar earlier today.
I took my son out to a forest place today and there were a couple of people with tops on that said something like "Ukraine Taekwondo". I could hear them talking in a foreign language and I was sat there wondering what horrible things they might have seen before they came here as refugees.
Then I heard them talking to somebody else. They weren't from Ukraine, they were Welsh.
I'm very glad I am an ignorant prick that doesn't talk to strangers, imagine if I'd welcomed them to the UK or something daft like that.