Brexit concluded (among other issues) that letting 28 un-elected commissioners decide EU law and preventing elected members of the European parliament (MEPs) from initiating new legislation or repealing existing law was not acceptable. As to removal of the governing body, unless I'm mistaken that's not possible. You can only vote for MEPs. Thus, UK citizens opted by a majority for control returned to Britain.
Was nationalistic xenophobia on display? Short answer, no! New research from ICM for British Future finds that 84% of the British public supports letting EU migrants stay – including three-quarters (77%) of Leave voters. Among Conservatives, support for protecting the status of EU citizens in the UK and UK citizens in Europe is even higher at 85%, with 78% of UKIP supporters in agreement.
Aggrieved peoples within a trans-national entity may not contribute towards a recipe for a peaceable environment.