said Egypt could become a haven and a battleground for small Salafist militant groups such as Jund Ansar Allah, Army of Islam and Jaljalat, which have been squashed by Hamas since it took control in 2007. The barrier has proved to be of little effect, with it being "breached hundreds of times" according to an Egyptian security official. After the fall of the Mubarak regime in 2011, Egypt relaxed restrictions at its border with the Gaza Strip, allowing more Palestinians to cross freely for the first time in four years. The Egyptian army continued to destroy Gaza Strip smuggling tunnels, according to the Egyptian army "in order to fight any element of terrorism". As of April 2013, Egypt reinforced its troops on the border with the Gaza Strip. Egyptian Army has been destroying tunnels by flooding them. By September 2021, Egypt had destroyed more than 3,000 smuggling tunnels over six years by flooding them or by pumping in toxic gas, at times resulting in deaths. Support In 2010, Palestinian Authority President Mahmoud Abbas declared support for the barrier, adding: "It is the Egyptians’ sovereign right in their own country. Legitimate supplies should be brought through the legal crossings." The United States announced its support for the barrier saying it would help to prevent weapons smuggling. Cairo's main Al-Azhar University officially backed the government's decision saying that it was the "state's right to build along its walls facilities and obstacles that will enhance its security." Opposition Militant Islamist group Hamas, the de facto governing authority of the Gaza Strip, opposes the barrier and has called it a "wall of death". Hassan Nasrallah, chief of Lebanese militant group Hezbollah, called on Egypt to halt construction. The Islamic Action Front, a Jordanian Islamist group, criticized Egypt for the barrier and accused it of "collaborating" with Israel and the United States. "The Egyptian authorities are ...increasing the suffering of the Palestinians in Gaza by building the steel wall and closing the border crossings with Gaza," said Hamzah Mansour, a member of the Shura Council of the Islamic Action Front. A number of prominent Muslim clerics issued edicts against the wall, while Sheikh Yusuf Qaradawi, affiliated with the Muslim Brotherhood in Egypt, voiced his objection to the wall. In January 2010, small protests against the wall were held outside the Egyptian embassies in Jordan and Lebanon. In a 2010 Palestinian demonstration along the border, an