If Gilead is wicked, Surely they are worthless. In Gilgal they sacrifice bulls. Indeed, their altars are like heaps in the furrows of the field.
"In Gilgal they sacrifice bullocks ..." There was one altar where the Jews were commanded to worship God, but they had perverted that by multiplying and setting up altars all over the nation.  Gilgal was especially associated with the worship of the bull-gods; see under  Hosea 4:15, above.