1)
Will they be embarrassed, and afterwards finished off?
1.
Radak: When they will be finished off, they will be ashamed 1 .
2.
Malbim: Yes - they will be totally eradicated.
1
Perhaps he means that when they will be virtually eradicated, those remaining will be ashamed. (PF)
2)
Who are "Mevakshei Ra'asi"?
1.
Malbim: Those who slander me.