ROME — Italy’s foreign minister is warning that the European Union will “collapse” if governments treat Italians like lepers over the coronavirus and “black list” Europe’s one-time virus epicenter during the summer tourism season.

Luigi Di Maio posted a blistering Facebook message Saturday after Greece excluded Italians — as well as nationals from Spain, Britain and other countries with high infection rates — from the list of foreign tourists it will welcome this summer.

Di Maio said competition for tourism is one thing, but he insisted that it be healthy and fair in demanding a European response to the reopening of EU borders after virus lockdowns. He warned: “If you act differently and dislocated, the EU spirit will be lost. And Europe will collapse.”

Di Maio praised French Foreign Minister Jean-Yves Le Drian for making his first post-lockdown visit to Italy on Wednesday. Di Maio said he would be traveling to Germany, Slovenia and Greece in the upcoming week to make the case that Italy is ready to receive foreign tourists. Tourism and its related industries account for some 13% of Italy’s GDP.