What you are saying might be true but you are only pointing out massive Kingdoms... Which, obviously, had a lot of people with diferent customs and languages inside.
Still, that does not mean nationalism did not exist... Russia got quite a "few" minorities inside their borders today, as do many other countries... If you are going to say that nationalism inside these countries do not exist, because they got countless people with diferent languages inside their borders or whatsoever, you are completely wrong.
Using a "complete lack of ethnic homogeneity" to justify "nationalism" is a rather bad excuse in my opinion.
This isnt reactionary, and much less an anti-immigrant sentiment, but it is true that nowadays immigrants are given nationality out of thin air. Most dont even know how to speak the language properly, dont know anything about history (not even who the hell was the first King in the country they live at), never shed a single drop of blood for the country and never contributed in any way to the economy (most immigrants are actually a burden to the economy) by paying taxes for their entire life, so why should they have the same rights as the ones who were born inside their own country and whose ancestors contributed to the progress of the nation at stake?
How many people have shed blood for their countries today, either literally or metaphorically?
What does it matter if someone's ancestors contributed to the progress of their nation? Should it be that simply because my great grandfather helped to create the swedish industry, I have more right to Swedish citizenship than a person who's parents moved here only 20 years before he was born? Even if I am lazy and he is hardworking?
Of course there are reasons to block out some of the immigration, especially the people who aren't going to be a productive part of society and have immigrated for economic reasons alone.
The concept that a hardworking immigrant is granted the same rights as a hardworking ethnically swedish person has does seem to make sense to me at least.
Yes, some of the newcomers aren't hardworking and don't contribute to the economy, these are a minority in all Western European nations that which I have studied however. The problem isn't that immigrantion 'is generally bad' but rather that most countries policies on immigration are lacking. That is true in Sweden as well as(from what I understand) in Portugal. There seems to be no good reason to end immigration completely or even to stop giving out citizenships to immigrants. For an example of a working immigration policy, check out Spain. It's not perfect but the immigration has given that country a large boost.
As for knowing who your first king was, I don't know who the first swedish king was and I'm really interested in history. You'd probably have to search for quite a while to find a Swede that can tell you the answer to that question without googling it. History class at school was really a little bit of European history but mainly World history. If you wanted to know Swedish history you had to find it out on your own. The simple fact is that as nations develop, the history taught in school tends to be less focused on it's own country and more on the rest of the world.
What you are saying might be true but you are only pointing out massive Kingdoms... Which, obviously, had a lot of people with diferent customs and languages inside.
Still, that does not mean nationalism did not exist... Russia got quite a "few" minorities inside their borders today, as do many other countries... If you are going to say that nationalism inside these countries do not exist, because they got countless people with diferent languages inside their borders or whatsoever, you are completely wrong.
About languages and nationalism, there are few examples of parts of countries that do not speak the same language as the capital but are still strongly nationalist. The many minorities within Russias borders usually feel a lot less strongly for Russia than ethnical Russians do.
In spain there's Catalonia which has it's own language(Catalan) and which has a population that feels less strongly 'Spanish' than the general populace does. Many Catalans still wish to have more autonomy and they define themselves as different from 'regular spaniards'. For example they recently banned bullfighting to demonstrate that they didn't agree with the current consensus in Spain.
Catalunya has been a part of Spain for more than 500 years.
It doesn't really matter that much what holds true for today though since back then there doesn't seem to have existed much nationalism, same language or not. The fact that different languages came to be spoken in what was supposedly single cultures is more like an effect of the regionalism that existed back then. Villages relatively close to eachother had much less interaction then than they had after the renaissance for example.
While some 'nationalism' seems to have existed among poorer people in the Rome towards the Roman Empire, there really doesn't seem to be any corresponding one during most of the middle ages. Outside of the royal family and a few nobles that is.
Using a "complete lack of ethnic homogeneity" to justify "nationalism" is a rather bad excuse in my opinion.
Some Ethnic homogeneity seems to be kind of a prerequisite for nationalism though. It's harder to feel a belonging with people who you don't really know much about and who speak kind of 'weird'(there were different accents even within Portugal). When you see people from the village a few kilometres away as about as foreign as the people over in France(from a portugese point of view) you're not going to be very nationalistic.
Sorry everyone about the long post!