I don’t understand why so much death of innocent kids can then just be swept under the guise of some “god’s will” with these religions

Because otherwise they’d have to grapple with the reality that their actions led to the death of a child. Blaming god when things go wrong both absolves them of any culpability and also invalidates the need to critically examine the behavior that caused the death in order to prevent future deaths from happening.

Same reason why the reaction to school shootings is “thoughts and prayers” instead of doing fucking anything.