How is this for the sake of Hashem's name?
Radak: My name is called on you - you are called Am Hashem. Also Moshe said "v'Hem Amecha v'Nachalasecha" (Devarim 9:29).
Malbim: I am normally patient with a sinner - perhaps he will repent. However, since you sin from the womb, I do not hope that you will repent. All the miracles do not help. It would be proper to punish you immediately. I delay punishing you, lest My name, which is called on you, be profaned.
What is the tense of "A'arich"?
Rashi: It is present tense.
Radak: It is future. In every generation I will delay My anger, for you deserve eradication due to your bad deeds.
What is the meaning of "u'Sehilasi Echetam Lach"?
Rashi: This is My praise, that Echetam for you. Echetam it is an expression of Chotem (nose). I will seal My nose, lest smoke leave My nostrils, and from being angry at you. One who is angry, smoke leaves his nostrils - "Alah Ashan b'Apo" (Tehilim 18:9). Every Charon Af is an expression of the nose being heated. Also "v'Atzmi Charah Mini Chorev" (Iyov 30:30) - my nose snorted amidst great heat.
Radak: It is My praise that I have a special nation among the nations, which clings to Me. If they sin against Me, they return to Me. Echetam is like A'arich Api, for the Af (nose) is called Chotem.
Malbim: For the sake of My praise, when I punish you I will not put all My anger on you, only a little, and I will not cut you off.