The attacks near Eilat had to have been conceived long before the incident you mention. That incident too was a gratuitous and senseless act.. The rocket attacks might be retaliation retaliation, They might just be escalation of ongoing rocket attacks. We may trace the tit-for-tat back to the pogroms of 1920. If we do, then someone will point to a bandit shot by a Shomrin outside Petach Tikvah.
One student killed, three wounded at Arizona campus during fight (a)
from the article: 30 rockets strike Israel day after coordinated terror attacks kill 8