Old Testament God vs. New Testament God

Many people say God acted much differently in the Old Testament
than he did in the New Testament. They say the God of the New
Testament is merciful and compassionate, but in the Old Testament
he is often harsh and unforgiving. A thorough look at Scripture
reveals that this is not the case. God is in fact merciful and just
throughout the Bible. Fr. Mike clears up a great deal of confusion
between the Old and New Testaments, and shows how God has stayed
quite the same since before the beginning of time until now. This
isn't the first time Fr. Mike's been asked about God changing,
check out his original answer here
(https://media.ascensionpress.com/podcast/didgodchange-2/).