That's a strange thing to say. Globalisation is usually criticized as a race to the bottom. The opposite of that is protectionism, which you say is bad. So which one are you in favour of?
Take the UK for example: at the time of its accession to the EU it had a sizeable manufacturing and mining economy. Globalisation directly led to those factories and mines closing, but being in the EU meant the UK could specialise in emerging sectors and immediately export to the rest of the EU for free (e.g. service-sector, information economy, banking, finance, media, etc).
Globalisation and economic-interdependence is also the main driver for world-peace. I’d rather be unemployed because someone in France does my job but cheaper than be fighting in a war against France for some sense of “national pride”.
Globalisation needs a friendlier face, yes. And we need better ways of managing the local negative effects, like better unemployment income for plant closures - but I don’t believe the sentimental negatives in any way outweigh the long-term benefits.
Debatable. But even if the EU was - or was not - a tightly integrated federated state, I'm far more concerned about the UK withdrawing itself from the world's largest free trade bloc. I see it heading towards either economic protectionism (bad in the long-term) or getting into a race-to-the-bottom (potentially even worse).