The Islamic State has warned Italy that if they are attacked they will send over 500,000 migrants, Italian media report this morning.../...

The ISIS plan seems more plausible even because the theft of boats from Tunisian and Egyptian ports has seen a rise in the past weeks.(Has Egypt and Tunisia confirmed?)

Italian media also report that Hamas is urgung Italy and other European nations not to intervene in Libya as this would signify that Europe would have launched a crusade against Arabs and Muslims.
http://www.independent.com.mt/articles/2015-02-17/world-news/ISIS-warns-Italy-If-you-hit-us-we-ll-send-over-500-000-migrants-6736130746

Hamas on-board in Libya it looks :
In response to the tensions, Italy closed its embassy in Libya and brought back about 60 Italians early Monday.
Bardawil was quoted by the Palinfo agency as warned "some countries, such as Italy" against using the "excuse of fighting terrorism" to meddle in Libya.(ANSAmed).
http://www.ansamed.info/ansamed/en/news/sections/politics/2015/02/17/hamas-warns-italy-not-to-embark-on-libyan-crusade_c85eac8f-1073-4e8c-bbb8-b4907d15aec5.html

In retaliation for an Egypt's court decision

Egypt’s “Cairo Court of Urgent Matters” issued a verdict banning Hamas and designating its military wing, the Al-Qassam Brigades, as “terrorist organizations.” The court ruled that:

• The group were implicated in bombings in Egypt.
• The brigades have been planning and financing terrorist attacks in Egypt.
• The brigades and Hamas have changed from their original objective of fighting the Israeli occupation, and is now aiming to target Egypt’s security.

A spokesman for Hamas said that the verdict was “dangerous,” and that “Al-Qassam Brigades are the symbol of resistance against the Israeli occupation, and a symbol of the [Palestinian] nation’s pride and dignity, despite all attempts at defamation.”

http://www.breitbart.com/national-security/2015/02/01/world-view-egypts-al-sisi-blames-foreign-countries-for-terrorist-attacks/

Tunisia and Algeria on alert, upgrade borders security :
http://www.libyaherald.com/2015/02/17/tunisia-and-algeria-send-military-reinforcements-to-borders-with-libya/#axzz3S3E3Uyai