I mean it's simple as if you are talking about them, then it's their context that matters if it is normal for them or not. ¯\_(ツ)_/¯
If they were talking about you it wouldn't be normal even if they considered it normal since they were talking about you and your context.
It's just how normalcy works...
"it's normal for them so it's normal" to "it's normal for them but not to you"
I'm not sure how you've understood it like this. It's normal for them has been the thing the whole time. You said it's not normal but it is normal for them though, you can't decide normalcy for their context
Same as I can't say it's not normal for people in Peru to eat guinea pigs. But it is normal for them, it's just not normal where I live. Do you see now?