Khaled Bin Ahmad Babitain (photo courtesy al-bjadyah.com)
Khaled Bin Ahmad Babitain, a professor in the Shari'a Department at Um Al-Quraa University in Saudi Arabia, is also the director of the university's Center of Islamic Studies. In an interview on cyber jihad, he stated: "I see no problem in destroying and hacking anti-Islam websites which are totally against Islam, such as Israeli websites."
In answer to a follow-up question regarding the permissibility of hacking infidels' websites, he answered that if these sites call for apostasy and are against Islam, it is all right to destroy them.
Sources: uqu.edu.sa, al-sunan.org
May 8, 2013