We later find out that this nurse was called Devorah as we learn about her death in Bereishis 35:38. The pasuk over there expressly calls her the nurse of Rivka.
It would make sense to assume that she was sent at the time to care for Rivka, owing to the fact that Rivka got married at such a young age. Indeed the Targum Yonasan translates the word '...
I think your question is based on an inaccurate assumption.
You are assuming that these Amalekite children are being killed-punished- for the sins of their ancestors.
That's not 100% correct.
In Judaism, suffering can come for multiple reasons. These reasons can be categorized loosely into two categories: Past and Future.
For a great introduction and ...
Negaim i.e Tzaraas skin disease - takes effect against our will whether we sin or not even without prior warning (despite the fact that sometimes one is warned as questioner assumes)Yalkut Shimoni Vayikra 247*
ומה נגעים שטמא בהן אנוסין*
Indeed the Gemara Nedarim 35b states that all under-aged mechusrei Kapara (those who need to bring a Korban inorder to ...