What is the meaning of "v'Nipatztim Ish El Achiv"?
Rashi: I will strike one on the other until they break into small pieces. This is like "ki'Chli Yotzer Tenapetzem", "v'Nipetz Es Olalayich" (Tehilim 2:9, 137:9). Every Nipetz in Tanach is like this.
Malbim: Like one who shatters a Nevel into tiny pieces, [so will be shattered and separated a man from his brother, and fathers from sons].
What is "veha'Avos veha'Banim Yachdav"?
Rashi: I will strike one on the other.
Malbim: Refer to 13:14:1:2.
What is the difference between Echmol, Achus and Arachem?
Malbim: Rachamim is only on people 1 . Chemlah and Chus are also on other matters. Chus is due to need for the matter, like "v'Einechem Al Tachos Al Kleichem" (Bereishis 45:20); Chemlah is due to [concern for] the matter itself; he sees that it is good and complete, and is loathe to destroy it due to it itself.
"V'Rachamav Al Kol Ma'asav" (Tehilim 145:9) is not limited to people! Rebbi (Bava Metzi'a 85a) applied it to rodents! Brachos 3:5 implies that Rachamim applies to birds! This requires investigation.