"Public opinion" is a term that refers to what the public in aggregate thinks about an issue. Perhaps you are not clear about what the term means in English. On the issue of EU federalism there is no majority in favour. I do not express my own opinion when I state this and your own anecdotal opinion is irrelevant, too. So again, please let others refer to public opinion even if you disagree with it.

I am familiar with what the term means, but barring a vote, you do not know what the public opinion would be.

So please stop claiming popular support for your ideas based on what could most charitably be described as unfounded hunches.