No one really cares about dead Arab children. The support for Hamas comes from a desire to get the Jew.
As for this terror attack, it was performed by the "Good Guys" (Sunni Jihadis or Western special forces) to kill Alawi civilians so there is no outrage
as it seems to close a time to divide Syria as planned.
1 - to fight the Syrians each other even is located the largest number of deaths.
2 - divide Syria into sectarian weak states
"This is required as planned" to Syria.