Isaiah 59:12

So [then], fulfill the pattern of behavior begun by your forefathers.

who killed the Lord Jesus and the [Old Testament] prophets and also drove us [apostles] out [of Thessalonica and Berea. See Acts 17]. They are not pleasing to God and are hostile to all people,

Now we [all] know that everything the law says applies to those who are under [obligation to obey] that law, [Note: Here "the law" appears to refer to the Old Testament Scriptures generally, since Psalms and Isaiah are quoted. See verses 10-18]. This is so that the mouth of every objector may be stopped [i.e., from making excuses for his sin], and thereby bring the entire world under God's judgment [i.e., both Jews and Gentiles].