Analysis-In surprise attack, Hamas strikes Israel and regional security realignment

By Samia Nakhoul, Nidal al-Mughrabi, Matt Spetalnick and Laila Bassam DUBAI/GAZA/WASHINGTON (Reuters) - When Islamist group Hamas launched a spectacular attack against Israel, it also took aim at efforts to forge new regional security alignments that could threaten Palestinian aspirations for statehood and the ambitions of the group's main backer Iran. Saturday's assault, the biggest incursion into Israel in decades, coincides with U.S.-backed moves to push Saudi Arabia towards normalising ties with Israel in return for a defence deal between Washington and Riyadh, a move that would slam the b...