I just returned from Egypt and I was really worried about backlash about being American and even though I'm from Canada, I'm a US citizen now and when people ask, I tell them I'm American, whatever the repercussions. I was really worried because I was in Cairo when Trump started in about moving all the Palestinians from Gaza strip to Egypt and making the Gaza strip a resort. Then that horrible video was released.

Truly, I was horrified.
This is what I learned; the Egyptians were the nicest most kind people I've ever met. They did not hate all Americans and seemed to give everyone a chance. From people I met on the street to people in villages to the Egyptian people in hotels and restaurants. Certainly I was as respectful of their customs and religion as I could be (91% are Sunni Muslim). So I dressed conservatively and wore a scarf on my head most of the time. I learned as much as I could about their customs which while I was fascinated with pyramids and temples, I found even more interesting.
The greatest moment for me was when I was visiting a Citadel in Alexandria (Quaitbay) and there was an Egyptian class (kids probably around 10 or 11) visiting also and the students were fascinated with America and wanted pictures with my husband and I and asked us a thousand questions. I am still in touch with our guide from there (and now friend) and I truly hope that someday she can visit me in Florida.
Anyhow, my point is that most people I've met traveling give people the benefit of the doubt regardless of their nationality and don't seem to blame us for electing a monster like Trump. They know that close to 50% of the country did not vote for him.
Some of the hatred in Italy and Spain right now are not solely directed at Americans but at all tourists. Living near Disney, I get that. I try to be cognizant of it and respectful of their territory and customs.
Anyhow, I guess my point is, people are rarely hated for being Americans as long as they are respectful. Being respectful does include learning how to say some at least basic things in their language too.