Weird news - Father kills his own child for making too much noise

When you read news like this one, you wonder as to how somebody could do things like this. The bond between a parent and their children is extremely strong, where a parent could do anything to ensure the safety of the child. If somebody else says anything to the child, the parent can and in most cases, does react against such utterances by other people. Given all this, it seems impossible to believe as to how a parent could be so barbaric to their own children (link to article):

Enraged by the continuous bawling of his infant daughter, a man allegedly flung the two-month-old baby down a drain resulting in her death in West Bengal's Murshidabad district, police said on Monday.
"Mujibur Sheikh, a mason, was at his home and got irritated by the continuous crying of his baby. He asked the mother to calm the baby, but she failed. Enraged, he threw the baby into a drain which killed her instantly," said Jagannath Das, officer of Ragunathgunj police station.