Background: As a German living in Switzerland, I have a very thin line to walk.
The Swiss already think of Germans as exceedingly direct - whereas a Swiss person might say "Well I'm sure this idea could be good in some circumstances", a German popping in to say "I think this is generally a bad idea" is often looked at as if they had just threatened the speaker's mother with a loaded weapon.
I have a name that is not obviously un-Swiss. I have thus started to point out my nationality as a disclaimer for "Please read this as written. Do not imagine a Swiss person saying this; that would give you the completely wrong impression".
It's a bit saddening that this barrier exists; but rather than be constantly misunderstood, I have had to embrace highlighting my nationality-by-birth even though I have lived in Switzerland as an expat for over 10 years.