"Orwell disdained other British socialists who were 'too pure' to be patriots. Yet he was in every sense a good 'European': he fought with the International Brigades in the Spanish civil war, wanted to translate Émile Zola (J'accuse!) and hated passports and border controls. In other words, he was ready to accept the complexities of European inter-dependence and think outside of national boundaries when the cause was right."
Read more here.