I already posted a link where they took credit for it but I'll put another one up.
Jewish family slaughtered by Palestinian terrorists
StandWithUs is horrified and grief-stricken by the savage murder of five members of the Fogel family. Palestinian terrorists slipped into the house while the family slept, stabbed the parents, slashed the throat of 11-year-old Yoav, knifed 3-year-old Elad in the heart, and slit the throat of their three-month-old baby, Hadas. The mother tried to fight back but was murdered. We are heart-broken and mourn with the Fogel family members and the nation of Israel who had to bury an innocent young family because of a vicious and senseless attack.
We are outraged but not surprised by the Palestinians` reaction. Early reports indicate that Al Aqsa Martyrs Brigade, the military wing of Fatah, the governing party in the West Bank, took credit for the rampage. In Gaza, residents passed out candy and celebrated the massacre of sleeping children and their parents, just as many Palestinians celebrated after the 9/11 attack on the World Trade Center, and after civilians were murdered by suicide bombers during the second Intifada.
Jewish family slaughtered by Palestinian terrorists