Thanks again for your interest. I'll try to answer briefly:
Spain is a bad thing for us as long as the government takes lots and lots of our money to invest a very important part of it in Madrid. Spanish is bad for us as long as they are languages in contact, Catalan being in the worst position.
There is a very important difference between dialects and languages. You KNOW Italian is not any Spanish dialect. Catalan is not either. They are all romanic languages. I'm sure you agree, but in any case this is an incontrovertible scientific true. That is why we cannot compare the use of Catalan, Galician or Basque in the Spanish parliament on the one side and italian dialects on the other. The linguistic reality in Spain is much more like Belgium than like Italy.
Tourists visiting Catalonia will be able to communicate in several languages, including English, Spanish and obviously Catalan. Some Catalans have Spanish as a mother tongue, but most of them don't, so there is no empathy when using Spanish. When I go abroad, I consider Spanish an international language, not MY language. I do not feel anything special when Spain's football team celebrates a victory, and I do not feel anything special when someone talks to me is Spanish. Actually, it makes no sense to me if a German, a French or an Italian speaker talks to me in Spanish, because this is not my language. So, we don't want to be unpolite with tourists. We simply want to be natural. Spanish laws might say Spanish is official everywhere in Spain, but this does not mean we all have to speak Spanish all the time.
If people from all around the world expect to be in Spain, as you say, to hear people speaking Spanish, then maybe there is a mistake in expectation. You see, it's not our fault. People who travel to Italy do not expect to eat pizza all the time. You really eat other things, don't you? Spain is diverse too: it is formed by four nations, each of them having their own language and culture. If people do not know that, we'll try to explain.
You seem to ignore many aspects of Spanish history. You say: “I would easily understand your point if Catalunya was recently conquered by Spain and forced to be part of it... but Spain as we know it, it is this way since many years before our country was even formed!” Actually, the crucial date, the date of the loss of our souverainity, was 1714, but that was the culmination of many previous attempts. Besides, you should not forget Franco's dictatorship, which ended 1975. Not so far. And I know you will be surprised to hear about that, but right now the basis of the Spanish cultural empire is under suspicion. A Catalan investigator is showing a series of elements that lead to the need to reconsider how Spanish Kingdom could have used the Inquisition and its means to exterminate Catalan culture during the XVI century. Columbus might have been a Catalan, and America's discovery might have been a Catalan enterprise Castilia would have assumed as proper after changing things and deleting tracks. Some Siglo de Oro literary works are now under suspicion of cultural appropiation. El Lazarillo de Tormes could have been written in Catalan by a Valencian author, then translated to Spanish and finally all tracks destroyed. The same happens to La Celestina or Garcilaso de la Vega. If you read these works, Catalan tracks apear everywhere. And now the best: Don Quijote de la Mancha is under suspicion too for the same reason. Would you feel at ease in Italy if they had done so?
I hope this post has been useful to you and to anyone interested in the Catalan Countries and their way to independence. Do not hesitate asking for more explanations if you need them. Now you know a little more about us, and that will be good if you finally visit Barcelona. If you do, I'll be pleased to meet you.