'Incredible' in the Bible

The Lord of Hosts says this: “Though it may seem incredible to the remnant of this people in those days, should it also seem incredible to Me?”—this is the declaration of the Lord of Hosts.

Then everyone was astounded, and they were giving glory to God. And they were filled with awe and said, “We have seen incredible things today!”

Why is it considered incredible by any of you that God raises the dead?