Stay, Play our full part in Europe make it work for us,rather than constantly putting Salt on the Chip on our shoulder. Britain is Europe's major (long term) problem with it's constant need to make policy changes and refusal to join a single currency (how would the Euro be performing if Sterling was taken out of the equation?).
The Racist view will be heavily used by supporters of Brexit those who are taken in by the vicious Bile they Spout are more to be pitied than anything else.
The other question that should be asked is why Politicians are now so keen on holding Referendums (could it be that when it all goes tits up they can shift the blame back on us), we pay them to make decisions not to ask us what to do without giving us the full facts