ye shall make no league. Compare Exodus 23:32.Deuteronomy 7:2; Deuteronomy 7:5, &c.
ye shall throw down. Compare Exodus 34:12; Exodus 34:13.Deuteronomy 12:3.
why. ? Figure of speech Erotesis (App-6). Or, "what [is] this [that] ye have done? "
Related Commentaries of Judges 2:2
Judges 2:2
2 And ye shall make no league with the inhabitants of this land; ye shall throw down their altars: but ye have not obeyed my voice: why have ye done this?