Nationality

OK,I didn't see this coming!Everyone forgot the original question!

I guess we've read different books about the propaganda of the Nazis, after they took control. But anyway, Bismarck united Germany in the 1890's I thought. Before that Germany was principalities, I thought. But, let's not give too much adoration to Bismarck; he was supposed to be anti-Catholic for some reason, as I've read?

I had no idea that you were referring to the Nazi period in Germany or other parts of Europe here.
Anyway, those were called "life unworthy of life" (German: Lebensunwertes Leben) by the Nazis.

Germany was unified in 1871.

Because of its intensity the German Kulturkampf - what you called "Bismarck was supposed to be anti-Catholic" - is most widely known, but happened elsewhere as well (e.g. the Sonderbund War in the 1840's in Switzerland, in various other European countries, in Mexico ...)

But coming back to "nationality" ... a "German nationality" only exists since 1934. In the 1871 Reich and the the Weimar Republic, the Germans got as nationality that of the state they lived in.

I think it has to do with the negative media coverage that we are bombarded with much too often. When most people talk about our enemies, it's about Russia. Their expansion into other countries.
On a personal level, I know a couple of Russians. I met Sergei through a2k, and when I visited Moscow, he gave me a private tour of Moscow most visitors don't see. He spent the whole day with me, and dropped me off at the ship.
I met Oleg in Havana, Cuba, at a cigar store. We spent a couple of hours talking with him and his buddies. I was with my travel buddy, Alexander, who lives in Mexico but is from Canada. Alexander and I have traveled the world together, because my wife hates travel. Alexander has Oleg's email address if I wanted it.
When I traveled to China the first time, our Travel Director said we could ask him any question, including politics, because most Chinese don't speak English.
I know I've been fortunate to have traveled extensively, and have met many people through my travels - including many Americans. I have friends in Mexico, Australia, Germany, England, Singapore, Malaysia, Africa, and Canada. I have taken about 200 trips abroad or about 90 unique countries including Antarctica.

most of my family ere originally Russian Jews and my grandfather used to comment in Polish about the Incompetence of Russian tech.

Durability of goods was never high on their lists of "must haves".

Jadek used to say that "even Russian candles stop burning halfway down"

I only say that one's ancestors came from Czarist Russia, if they came to America before the Bolshevik Revolution. That being because I was under the impression that Jews in Russia were not citizens, but the personal property of the Czar, a la he moving them here for there like in the movie, Fiddler on the Roof. Also, some Czar mandated Jews in Russia to take on last names sometime in the mid nineteenth century. Before that they only used first names in the shtetles. So, German Jewry being the upscale Jews were what the Jews in Russia copied, giving themselves oftentimes German last names, even with a bit of humor (Schoenfeld=sunny field, or better yet, Tannenbaum=evergreen, aka Christmas tree).

Germans are the largest ethnic group in the US.
http://www.businessinsider.com/largest-ethnic-groups-in-america-2013-8

I know.

But actually I'm wondering about that - why are there Scottish, Scottish-Irish, Welsh and why not Hessians, Prussians, Bavarians ... ?

This emphasis on nationality is oftentimes silly for many. Granted, U.S. citizens of German descent might enjoy an Oktoberfest more than others, and those of Italian descent might enjoy Italian cuisine more than many others (or at least be more knowledgeable about it), and those of Irish descent may reflect back on the struggles of Irish in the U.S. in earlier centuries; however, the real partition in the U.S., in my opinion, is just religion. That means that those that are Catholic feel they are a group unto themselves (except those of German or Irish descent seem to approximate the next group), and Protestants were once mostly White Anglo Saxon Protestants (WASP for short), but today all Protestants seem to be part of the same identity, even though sociologists do refer to "In Protestants" and "Out Protestants," for purposes of defining social class. And, Jews are thought of, more or less, in my opinion, as a "resource" to make the U.S. somehow better (i.e., Dr. Salk was Jewish; so was Dr. Sabin, of the polio vaccines). Anyway, it is my opinion, that even though everyone is a U.S. citizen with the same legal rights, I believe that Protestants somehow think of themselves as their Americanism is more real. Perhaps, if I am in the least bit correct, it might be because Protestants tend to be the owners of land (ranches, farms, etc.) and on the interlocking directorates of corporate America. Tey point being that all can contribute up to their ability, and live comfortably, and accumulate wealth; however, again Protestants were here early, and some do regard Catholicism with a wariness that might reflect Catholicism being such a world-wide faith that is concerned with all, not just Americans. Just my opinion. I could be very wrong.

I think you ask a good question, but I know many Scottish-Irish migrated to the US because of the famine. Maybe, the Hessians, Prussians and Bavarians didn't have the same famine problem.