Rashi on Isaiah
This, that we sinned against Him This is what caused the plunder and the spoiling, what we sinned against Him.
Ibn Ezra on Isaiah
Who gave Jacob, etc. Then the people will confess and say: who has given us for a spoil? Certainly the Lord, it is He (זה═זו this), against whom we have sinned, and in whose ways our forefathers refused to walk.
Rashi on Isaiah
and they did not want Our forefathers did not want to go in His ways.