What does this Mizmor discuss?
Radak: Also this Mizmor (like the previous) refers to people in this exile.
Malbim (42:1): It refers to the third shortcoming in Galus - we are scattered among Nochrim and suffer pain.
What is the meaning of "Shafteni"?
Rashi: Take vengeance for me.
Radak: Judge my case against the enemies.
Why did he say "Rivah Rivi"?
Radak: I am not able to fight my case.
What is "Goy Lo Chasid"?
Rashi: It is Edom. [Esav] lived among two Tzadikim (his parents), and did not learn from their deeds (Sanhedrin 39b).
Radak: These nations that rule over me - if they were Chasidim, I would say that the truth is with them, and not with me, and my sins overpowered; therefore, I am exiled under their Reshus. However, they are not Chasidim. Further, they have no good deed; they are Ish Mirmah v'Avlah.
Malbim: They have no preparation to Chesed at all. Their nature opposes Chesed Bein Adam l'Chavero.
Why does it say "me'Ish Mirmah v'Avlah"?
Radak: "Ish" is a Klal for the entire nation, like "Ish Yisrael" (Yehoshua 9:6).
Malbim: Among the nation are men of deception and injustice - philosophers who pervert their beliefs and mindsets, and what is straight, they make it crooked. They make deceiving connections and errant evidence to contradict true beliefs. "Tefaleteni" - save me from stumbling and being drawn after their claims and falsified investigations to contradict basic beliefs!