I understand your concern about being identified as a US citizen when overseas, but I haven’t had any problems in that regard. Most Europeans are smart enough to understand the difference between a government’s policies (with which they may disagree) and its people. And on many occasions, especially in France and Belgium, I have been treated very kindly by older people who are still grateful to the US for its help during and after WWII.
I don't fear being identified as a US citizen while in Europe.It's Africa,Asia and South America that I have in mind.I use my Irish passport in Europe because of the ease with which I can enter and leave when using it.