> This is a lie. The Treaty of Rome of 1957(!) ....
The treaty of Paris 1951 [1] was established on the basis of economic trade in coal and steel, which was followed by The Treaty of Rome 1957 which established the European Economic Community which aimed to to do just that create an economic community. [2] Now, you can argue about what the people who set this up wanted and I'd agree many (Churchhill, Jean Monnet, etc) [3,4] did want a United States of Europe with a centralized European Army [4]. You could possibly say people voted on this since some of their leaders believed in this idea, and some of those leaders were elected in a democratic process (notably not Churchhill or Monnet) [5], but its a pretty long stretch.
> This is exactly what the British voted to join after de Gaulle
If you mean the EEC membership referendum of 1975, this is the actual question the Brits voted on "Do you think that the United Kingdom should stay in the European Community (the Common Market)?" [6].
That doesn't seem much like voting on being a member state of a United States of Europe to me. But maybe there are multiple ways of interpreting that, still newspapers referred to those in the yes camp as "pro-marketeers" or "Pro-Market" [8] which seems to suggest it was about economic trade and not so much political aspects of giving up national sovereignty.
I'd like to provide you with more facts about your other assertions but I don't have the time. Maybe someone else will.
1. https://en.wikipedia.org/wiki/Treaty_of_Paris_(1951)
2. https://en.wikipedia.org/wiki/European_Economic_Community
3. http://www.churchill-society-london.org.uk/astonish.html
4. https://en.wikipedia.org/wiki/Jean_Monnet#Common_Market
5. https://en.wikipedia.org/wiki/Prime_Minister_of_the_United_K...
6. https://en.wikipedia.org/wiki/United_Kingdom_European_Commun...
7. https://www.theguardian.com/politics/from-the-archive-blog/2...