1)
Why does it say "Yekalelu Hemah"?
1.
Radak: Even though they curse me, I am not concerned, since "You will bless me."
2.
Malbim: They will know that You made them curse, in order that "You will bless."
2)
Why does it say "Kamu va'Yevoshu"?
1.
Radak: They stood against me, and they will be ashamed that their intent for me was not fulfilled.
2.
Malbim: They will be embarrassed, for their curse caused a Brachah to me. And this is why "v'Avdecha Yismach."
