Real reconciliation can only be achieved in a relational context, and the New Testament speaks volumes about the new community in Christ and what those relationships are to be like.
In answering your question, it is important to understand that your parents’ eternal salvation is not a reward given to them for their faith. Salvation is not in any sense a reward.
It is a disastrous time for Israelis and for the innocent Palestinian victims of Hamas. How can we, as followers of the Prince of Peace, Jesus the Messiah, respond to difficulties of this day?