For they being ignorant of God's righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God.
For they being ignorant of God's righteousness - i:e., that righteousness which God approves and provides for the justification of the guilty (see the note at Romans 1:17).
And going about ('seeking') to establish their own righteousness, have not submitted themselves, х hupetageesan (G5293)] - 'submitted themselves not'
Unto the righteousness of God. The apostle views the general rejection of Christ by the nation as one act.