My own experience suggests nothing of the kind - I meet many EU and other nationals in my work - and that would be backed up by every survey on matters surrounding attitudes to immigration, which show that hostility to immigration has fallen sharply since the referendum.
Does the OECD possess a parliament, an executive, and a supreme Court, with an extensive and ever increasing mandate to legislate and enforce legislation across borders, a single currency and a central bank, a foreign policy and military HQ, with an ingrained culture of continuous centralisation and a commitment to 'ever closer union'?
No, of course it doesn't, otherwise the US wouldn't be a member.
But then you did say 'fun fact'.