The Tripoli insurrectionist islamic "government" is demanding that any response (to thousands of people being launched onto the sea to take their chances in return for millions of dollars mulcted from them and their (extended) families) should be negotiated with Tripoli first. Such public attempts to legitimise their status as worthwhile interlocutors is ignored by the Italian government.
It is the Italian government that makes all decisions on the defence of its borders. National security is within the remit of individual member states of the European Union and Italian decision-taking includes, but is not be bound by, its ties with Brussels; and with the United Nations. Acts of war such as instituting a naval blockade (which would alter the relationships with the EU or the UN) are not envisioned among the Italians' reactions to the use of migrants as islamic attack-weapons upon Italy.
Italy has now ascertained that European states will resist any formal reallocation (of the unfortunate human weapons used by islamicists) to the entire EU membership. The informal reallocation will continue apace, with the steady transfer northwards of these modern-day slaves. Unfortunately there being no European demand for slaves these days, there is little to be done but pull these people from the water; after which there is nothing for them except reliance upon our Christian and human duty, insofar as we are able, to support them in their powerlessness.
The movement northwards is now being put onto a more organised footing: instead of the patchy and often criminal and exploitative transfer systems via France, government collection centres are being established further and further north where processing can take place and the necessary settlement -rights papers issued for on-goers to other countries. Most want to continue their migration; there is little scope for welfare-driven settlement in Italy (or Greece, for that matter). The state welfare systems are in the north of Europe, not here; and what is here in the South is being dismantled under 'troika'-style debt repayment obligations and demand for 'restructuring'. North European nations wanted less welfare in the South? Then their human and Christian (the words are interchangeable in Italian - Human is Christian, as once it was in English) responsibility to these rescued people is to provide what they have stripped, in their 'debt'-repayments policies, from Southern European member-states.
Italy is already protecting its moral, economic and security statuses along the north African coasts, rescuing, sifting through the boatloads that it rescues, and arresting the threats to internal security, monitoring, disrupting and prohibiting extant links between organised crime (Italian) and slavers (islamic); (the latest arrests are of the master and mate of the boat from which islamics threw dozens of Christians to their deaths before they were rescued. These people were taken from a migrants' collection zone in Foiano della Chiana, near Arezzo, yesterday and charged). Italian security services' networks in their north African former colonies are excellent and large numbers of those involved in this 'weaponisation' of people are being picked up and dealt with.
Europe might think itself clever in refusing to help, indeed hindering attempts to officialise European-level resistance to low-level islamic warfare but, frankly, Italy can see to its interests much more efficiently than when it is hampered by the politics of others with wholly different political and social goals and needs. In the end they will have what Italy needs - the relocation of the rescued - imposed upon them.