1)
Why does it say "v'Shav ha'Goy ha'Hu"?
1.
Malbim: I spoke about it in order that it will repent!
2)
What is "me'Ra'aso Asher Dibarti Alav"?
1.
Rashi: Its reproach - from its sins, for which I spoke about it, to destroy it.
2.
Malbim: Even though it repents only due to fear of the punishment that I decreed, the Teshuvah helps to nullify the decree.
3)
What is the meaning of "v'Nichamti"?
1.
Rashi: I had a different intent.