It is sad that the bomber picked a shrine a place where believers and tourists congregate. Some may well have been seeking a religious connection.
Bombings are random meant to kill the maximum number of people religious belief does not protect you in these events. The Bible is correct in this instance when it talks about time and unforeseen circumstances befall us all. Those with a belief may hope that their loved ones have gone to a better place or that the suffering was not in vain.
To berate someone who survived such an event for not thanking god does a believer no credit. These events lead many to question the existence of a benevolent god so it would be more appropriate to express sympathy and humility.
Glad you are safe come home soon.