This case illustrates the classic Liberal problem: Enemy identification.
Liberals will always side with the enemy, even in the case of a despicable terrorist act. This is why you cannot trust a liberal president to defend his own country.
During last summer's Gaza war. Liberals on Discussionist were dismissing the 1000s of missiles shot into Israel as bottle rockets. When the left finds it has more in common with monsters, do not be surprised when it acts like a monster.