If that's a valid characterization of the internal debate, of what concern is that to the EU? So far, I don't see the UK screaming, huffing, or smashing doors with respect to the EU.
there were constant phrases from "Leave" party that relationship with EU is abusive, UK is like slave.. it doesn't look for me like intelectual debate with polite arguments.
[1] http://www.standard.co.uk/news/politics/nigel-farage-claims-...