Which laws state explicitly that women should not be punished harshly if she kills her own child?
Please give a reference.
Topic starter is creating a false image by calling these type of killings 'endemic' in Europe, and giving only two examples. If you really want to use the word 'endemic' for the scale of infanticide, you should reserve that for countries like China and India.
Even in a highly moral country like Pakistan there a more baby killings than in the whole of immoral Europe in any given year, so I wouldn't brag too much about the downfall of the West...