1)
Why does it say "Gam Ani"?
1.
Rashi: You betrayed Me - also I will be against you.
2.
Radak: Just like you did unlike another nation, so I will do to you judgments that I did not do to them 1 , and I will not do further among them.
1
We corrected the text of Radak to say "Bahem" based on his Perush on verse 9. (PF)
2)
Why does it say that Hashem will do among them "Mishpatim"?
1.
Malbim: It will be in the way of judgment.
3)
Why will it be "l'Einei ha'Goyim"?
1.
Radak: It is so you will be ashamed of your evil deeds.